JPS6130478B2 - - Google Patents
Info
- Publication number
- JPS6130478B2 JPS6130478B2 JP16308780A JP16308780A JPS6130478B2 JP S6130478 B2 JPS6130478 B2 JP S6130478B2 JP 16308780 A JP16308780 A JP 16308780A JP 16308780 A JP16308780 A JP 16308780A JP S6130478 B2 JPS6130478 B2 JP S6130478B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- resin
- speaker
- photocurable resin
- diaphragms
- 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
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011256 inorganic filler Substances 0.000 claims description 4
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims 1
- 239000010445 mica Substances 0.000 description 4
- 229910052618 mica group Inorganic materials 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000016 photochemical curing Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- -1 Polypropylene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
本発明は光透過性と高弾性を有するマイカや単
結晶アルミナ粉体のような無機系フイラーシート
に光硬化性樹脂を含浸し、これを振動板形状に成
形した後、紫外線を照射して光硬化性樹脂を硬化
させ軽量で弾性率が高いスピーカ用振動板を生産
性よく製造できるスピーカ用振動板の製造法に関
するものである。
従来のスピーカ用振動板は天然パルプ繊維を抄
造成形加工によつて製造されていた。また、最近
では金属箔や合成樹脂フイルムを成形してスピー
カ用振動板とすることも多く行なわれている。
上記天然パルプ振動板は剛性が乏しく耐湿性に
欠け、金属箔振動板としてのアルミニウムなどは
重量が重く軽量化のために薄くすると曲げ剛性が
低下したり成形が困難になるといつた欠点をも
ち、合成樹脂振動板としてのポリプロピレンやポ
リエステルは十分な剛性が得られないといつた欠
点があつた。
このようなことから、カーボン繊維とエポキシ
樹脂からなるFRPは軽く剛性にも優れている
が、エポキシ樹脂は硬度も高く接着性に優れてい
る反面加熱による硬化時間が30分以上もかかり、
生産性の点で劣るものとなつていた。
本発明は軽量で剛性に優れ、生産性に富んだス
ピーカ用振動板の製造法に関するものである。
すなわち、本発明は光透過性で剛性に富んだマ
イカや単結晶アルミナ粉体の無機系フイラーシー
トに硬化後、硬度と接着性に優れたエポキシ樹
脂、エポキシアクリレート樹脂などの光硬化型樹
脂を含浸し、振動板形状に成形した後紫外線照射
によつて光硬化型樹脂を硬化させてスピーカ用振
動板を得ようとするものである。
具体的な例を示すと、第１図に示すように集成
マイカシート１に、変性エポキシアクリレート樹
脂100部に、増感剤としてベンゾフエノン２〜３
部、促進剤としてトリエタノールアミン３〜４部
加えて均一に混合した光硬化型樹脂２を集成マイ
カシート60〜80Wt％、光硬化樹脂20〜40Wt％の
割合となるように含浸し、これに紫外線を照射し
て、セミキユア状態とし、このセミキユアの状態
で第２図に示すような振動板形状に成形し、成形
後再び紫外線を照射して光硬化型樹脂２を完全硬
化してスピーカ用振動板とした。
なお、紫外線照射装置としては800W／cmの高
圧水銀灯で５〜７cmの距離下で照射し、完全硬化
は約15〜20秒であつた。
このようにして製造した本発明のスピーカ用振
動板と、従来のアルミニウム振動板、紙振動板の
物性を比較すると以下の通りであつた。
The present invention involves impregnating an inorganic filler sheet such as mica or single-crystal alumina powder, which has light transmittance and high elasticity, with a photocurable resin, forming it into the shape of a diaphragm, and then irradiating it with ultraviolet rays. The present invention relates to a method for manufacturing a speaker diaphragm, which is capable of producing a lightweight speaker diaphragm with high elasticity with high productivity by curing a curable resin. Conventional speaker diaphragms have been manufactured by paper-forming natural pulp fibers. Furthermore, recently, metal foils or synthetic resin films are often molded into speaker diaphragms. The above-mentioned natural pulp diaphragm has poor rigidity and lacks moisture resistance, and metal foil diaphragms such as aluminum are heavy and have drawbacks such as reduced bending rigidity and difficulty in molding when thinned to reduce weight. Polypropylene and polyester used as synthetic resin diaphragms have the disadvantage that they do not have sufficient rigidity. For this reason, FRP made of carbon fiber and epoxy resin is light and has excellent rigidity, but epoxy resin has high hardness and excellent adhesiveness, but on the other hand, it takes more than 30 minutes to cure by heating.
It was becoming inferior in terms of productivity. The present invention relates to a method for manufacturing a speaker diaphragm that is lightweight, has excellent rigidity, and is highly productive. That is, the present invention uses an inorganic filler sheet made of mica or single-crystal alumina powder, which is highly transparent and rigid, and is then impregnated with a photocurable resin such as epoxy resin or epoxy acrylate resin, which has excellent hardness and adhesive properties. After molding into the shape of a diaphragm, the photocurable resin is cured by irradiation with ultraviolet rays to obtain a diaphragm for a speaker. To give a specific example, as shown in Fig. 1, a composite mica sheet 1, 100 parts of modified epoxy acrylate resin, and 2 to 3 parts of benzophenone as a sensitizer are added.
The composite mica sheet is impregnated with 60-80 Wt% of photo-curing resin 2 and 20-40 Wt% of photo-curing resin, which is homogeneously mixed with 3-4 parts of triethanolamine as an accelerator. It is irradiated with ultraviolet rays to make it into a semi-cured state, and this semi-cured state is molded into the shape of a diaphragm as shown in Figure 2.After the molding, the photo-curing resin 2 is completely cured by irradiating it with ultraviolet rays again to produce vibration for a speaker. It was made into a board. The ultraviolet irradiation device used was a high-pressure mercury lamp of 800 W/cm, and irradiation was performed at a distance of 5 to 7 cm, and complete curing took about 15 to 20 seconds. A comparison of the physical properties of the speaker diaphragm of the present invention manufactured in this way with conventional aluminum diaphragms and paper diaphragms was as follows.
【表】
以上のように本発明のスピーカ用振動板の製造
法によれば軽量で弾性率の高いスピーカ用振動板
がきわめて短時間で製造でき、耐熱性、耐候性、
防水性にも優れたものとでき、コスト的にも有利
となるなどの利点をもち工業的価値の大なるもの
である。[Table] As described above, according to the method of manufacturing a speaker diaphragm of the present invention, a lightweight speaker diaphragm with a high elastic modulus can be manufactured in an extremely short time, and has excellent heat resistance, weather resistance,
It has the advantage of being highly waterproof and cost-effective, and is of great industrial value.
第１図は本発明のスピーカ用振動板の製造法の
一実施例における一工程の拡大断面図、第２図は
同成形後の半断面正面図である。
１……無機系フイラー、２……光硬化型樹脂。
FIG. 1 is an enlarged cross-sectional view of one step in an embodiment of the method for manufacturing a speaker diaphragm according to the present invention, and FIG. 2 is a half-sectional front view after molding. 1... Inorganic filler, 2... Photocurable resin.
Claims (1)
ートに接着性に優れ硬度の高い光硬化型樹脂を含
浸したものを振動板形状に成形した後紫外線を照
射して光硬化型樹脂を完全硬化させることを特徴
としてなるスピーカ用振動板の製造法。1. An inorganic filler sheet with optical transparency and high elasticity is impregnated with a photocurable resin that has excellent adhesion and high hardness, is formed into the shape of a diaphragm, and is then irradiated with ultraviolet rays to completely cure the photocurable resin. A manufacturing method for a speaker diaphragm characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16308780A JPS5787295A (en) | 1980-11-18 | 1980-11-18 | Manufacture of diaphragm for loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16308780A JPS5787295A (en) | 1980-11-18 | 1980-11-18 | Manufacture of diaphragm for loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5787295A JPS5787295A (en) | 1982-05-31 |
| JPS6130478B2 true JPS6130478B2 (en) | 1986-07-14 |
Family
ID=15766931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16308780A Granted JPS5787295A (en) | 1980-11-18 | 1980-11-18 | Manufacture of diaphragm for loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5787295A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011061311A (en) * | 2009-09-07 | 2011-03-24 | Minebea Co Ltd | Diaphragm for speaker, and speaker using the same |
-
1980
- 1980-11-18 JP JP16308780A patent/JPS5787295A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5787295A (en) | 1982-05-31 |
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