JPS6216062Y2 - - Google Patents
Info
- Publication number
- JPS6216062Y2 JPS6216062Y2 JP18248381U JP18248381U JPS6216062Y2 JP S6216062 Y2 JPS6216062 Y2 JP S6216062Y2 JP 18248381 U JP18248381 U JP 18248381U JP 18248381 U JP18248381 U JP 18248381U JP S6216062 Y2 JPS6216062 Y2 JP S6216062Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnesium
- diaphragm
- magnesium alloy
- glass
- oxide film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 239000010407 anodic oxide Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
本考案はマグネシウム又はマグネシウム合金か
らなる音響機器用振動板の耐蝕性を向上させたも
のである。
一般にマグネシウム又はマグネシウム合金は空
気中の水分、亜硫酸ガス、炭酸ガス等により、腐
蝕されやすいので、化成処理、陽極電解処理、又
はこれらの併用等により防錆処理を施し、処理面
の上に有機合成樹脂を塗装して用いられていた。
しかしながら、有機合成樹脂は有機溶剤に樹脂
を希釈したものを用いるので、溶剤が揮散した跡
の微孔を通つて空気中の水分、その他腐蝕要因と
なるガスが進入して腐蝕が発生する欠点があり、
数回の塗り重ねによつて微孔を防いでいた。この
場合厚い塗装膜を施すので、振動板が重くなり、
マグネシウム又はマグネシウム合金の比重が小さ
い、軽い特長が失なわれる欠点があつた。
溶剤を用いない樹脂、例えばエポキシ樹脂等の
低粘度のマグネシウム又はマグネシウム合金を侵
すことが少ない硬化剤を選び、硬化させれば、水
分などが容易に通るような微孔は出来ないが、基
本的には有機合成樹脂中にも微小ではあるが、水
分その他腐蝕要因となるガスが進入するので、苛
酷な条件下で使用する場合は厚い塗装皮膜が必要
とし、有機合成樹脂皮膜を厚くすると、マグネシ
ウム又はマグネシウム合金のヤング率に比較して
ヤング率が低下し、振動板に必要な入力信号に速
やかに応答する為の音速Ｅ／ρが低下してしまう
欠点があつた。（Ｅ：ヤング率 ρは密度）
本考案は上記欠点を取除く為に考案されたもの
で、図面に示す実施例について説明すれば、第１
図に示すごとく、マグネシウム又はマグネシウム
合金からなる振動板１表面に陽極酸化皮膜２を形
成し、ガラス３で封孔処理した音響機器用振動板
である。
本考案の陽極酸化皮膜に形成するのは、先づ１
中に苛性カリ165ｇ、弗化カリ35ｇ、燐酸ナト
リウム35ｇ、水酸化アルミニウム35ｇ、過マンガ
ン酸カリ20ｇを含む浴槽を設け、陽極電流密度
1.9〜2.1アンペア1dm2で電解浴槽を20〜25℃に管
理し、（5.5％アルミニウム、１％亜鉛、0.2％マ
ンガン）を含むマグネシウム合金からなる振動板
を電極クリツプで挾んで浸漬し、８分間陽極定電
流電解を行い、冷却水にて完全に電解液を洗い落
し、60〜80℃の温水に数秒間浸漬して振動板を予
熱し、次に温風にて乾燥することにより約６ミク
ロンの硬い陽極酸化皮膜が形成される。
本考案のガラスで封孔処理するには、上記陽極
酸化皮膜処理したものをテトラエトキシシラン20
部、エチルアルコール24部、水25部の混合溶液中
に浸漬し、10-3mmHg真空容器中にて約５分間真
空含浸して、陽極酸化皮膜のくぼみ、穴部に混合
溶液を充填し、真空含浸後液切りを行い、室温に
て約65時間放置してゲル化したものを約90℃で６
時間予備加熱し、次に１時間に約15℃の速度で
450℃まで加熱し、約30分間保持し、次に１時間
に約30℃の速度で除冷して硅酸ガラスの皮膜を形
成する。
本考案は以上に述べたごとく、マグネシウム又
はマグネシウム合金のヤング率を低下させること
なく、実用上の防錆が得られるもので、第１表に
それぞれの工程完了後のヤング率を示す。
The present invention improves the corrosion resistance of a diaphragm for audio equipment made of magnesium or a magnesium alloy. In general, magnesium or magnesium alloys are easily corroded by moisture in the air, sulfur dioxide gas, carbon dioxide gas, etc., so anti-rust treatment is performed by chemical conversion treatment, anodic electrolysis treatment, or a combination of these, and organic synthesis is applied to the treated surface. It was used as a resin coating. However, since organic synthetic resins are made by diluting the resin with an organic solvent, they have the disadvantage that moisture in the air and other corrosion-causing gases can enter through the micropores left after the solvent has volatilized, causing corrosion. can be,
Micropores were prevented by applying several coats. In this case, since a thick coating film is applied, the diaphragm becomes heavier.
The drawback was that magnesium or magnesium alloys lost their low specific gravity and lightness. If you select a hardening agent that is less likely to attack low-viscosity magnesium or magnesium alloys such as resins that do not use solvents, such as epoxy resins, and harden them, there will be no micropores that allow moisture to pass through easily, but basic Although small amounts of water and other gases that cause corrosion can enter the organic synthetic resin, a thick coating film is required when used under harsh conditions. Another disadvantage is that the Young's modulus is lower than that of a magnesium alloy, and the sound velocity E/ρ, which is required for the diaphragm to quickly respond to an input signal, is lowered. (E: Young's modulus, ρ is density) The present invention was devised to eliminate the above drawbacks, and if we explain the embodiment shown in the drawings, the first
As shown in the figure, this is a diaphragm for audio equipment in which an anodized film 2 is formed on the surface of a diaphragm 1 made of magnesium or a magnesium alloy, and the holes are sealed with glass 3. The first thing to be formed on the anodic oxide film of this invention is
A bath containing 165 g of caustic potassium, 35 g of potassium fluoride, 35 g of sodium phosphate, 35 g of aluminum hydroxide, and 20 g of potassium permanganate was installed, and the anode current density was
An electrolytic bath with 1.9 to 2.1 amperes 1 dm2 was maintained at 20 to 25°C, and a diaphragm made of a magnesium alloy containing (5.5% aluminum, 1% zinc, 0.2% manganese) was held between electrode clips and immersed for 8 minutes. By performing anodic constant current electrolysis, completely washing off the electrolyte with cooling water, preheating the diaphragm by immersing it in hot water at 60 to 80℃ for a few seconds, and then drying it with warm air, it becomes approximately 6 microns. A hard anodic oxide film is formed. To seal the pores of the glass of this invention, use the above-mentioned anodic oxide film treatment with tetraethoxysilane 20
24 parts of ethyl alcohol, and 25 parts of water, and vacuum impregnated in a 10 -3 mmHg vacuum container for about 5 minutes to fill the hollows and holes of the anodized film with the mixed solution. After vacuum impregnation, drain the liquid and leave it at room temperature for about 65 hours to gel.
Preheat for an hour, then at a rate of about 15°C per hour.
It is heated to 450°C, held for about 30 minutes, and then slowly cooled at a rate of about 30°C per hour to form a silicate glass film. As described above, the present invention provides practical rust prevention without reducing the Young's modulus of magnesium or magnesium alloy, and Table 1 shows the Young's modulus after each process is completed.
【表】【table】
【表】 本考案は工業上有益な考案である。【table】 The present invention is an industrially useful invention.
第１図は本考案の拡大断面図。 １は振動板、２は陽極酸化皮膜、３はガラス。 FIG. 1 is an enlarged sectional view of the present invention. 1 is a diaphragm, 2 is an anodized film, and 3 is glass.
Claims (1)
動板１表面に陽極酸化皮膜２を形成し、ガラス３
で封孔処理した音響機器用振動板。 An anodic oxide film 2 is formed on the surface of a diaphragm 1 made of magnesium or a magnesium alloy, and a glass 3
A diaphragm for audio equipment with pore-sealing treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18248381U JPS5885877U (en) | 1981-12-07 | 1981-12-07 | Diaphragm for audio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18248381U JPS5885877U (en) | 1981-12-07 | 1981-12-07 | Diaphragm for audio equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5885877U JPS5885877U (en) | 1983-06-10 |
| JPS6216062Y2 true JPS6216062Y2 (en) | 1987-04-23 |
Family
ID=29980882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18248381U Granted JPS5885877U (en) | 1981-12-07 | 1981-12-07 | Diaphragm for audio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5885877U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6154438B2 (en) * | 2015-07-22 | 2017-06-28 | Tsk株式会社 | Manufacturing method of speaker diaphragm |
-
1981
- 1981-12-07 JP JP18248381U patent/JPS5885877U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5885877U (en) | 1983-06-10 |
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