JPS6040756B2 - Manufacturing method of speaker diaphragm - Google Patents
Manufacturing method of speaker diaphragmInfo
- Publication number
- JPS6040756B2 JPS6040756B2 JP7002578A JP7002578A JPS6040756B2 JP S6040756 B2 JPS6040756 B2 JP S6040756B2 JP 7002578 A JP7002578 A JP 7002578A JP 7002578 A JP7002578 A JP 7002578A JP S6040756 B2 JPS6040756 B2 JP S6040756B2
- Authority
- JP
- Japan
- Prior art keywords
- speaker diaphragm
- manufacturing
- phenolic resin
- fibers
- phenolic
- 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
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
【発明の詳細な説明】
本発明は軽量で剛性が高く、成形性に優れ、しかも脆弱
性の向上を計ることのできるスピーカ用振動板の製造法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a speaker diaphragm that is lightweight, has high rigidity, has excellent moldability, and can improve its brittleness.
従来のスピーカ用振動板として高弾性率を有するものは
チタン，ベリリウムやアルミニウム箔などの金属箔を用
いたものがある。Conventional speaker diaphragms with high elastic modulus include those using metal foils such as titanium, beryllium, and aluminum foils.
しかしながら、チタンやアルミニウム箔を用いたスピー
カ用振動板は十分満足できる剛性や比弾性を得ることが
できず、ベリリウム箔を用いたものは、高い弾性率，比
弾性をもっているが、成形加工性に乏しく、コスト面で
もきわめて高価なものとなっていた。However, speaker diaphragms using titanium or aluminum foil cannot obtain sufficiently satisfactory rigidity and specific elasticity, and those using beryllium foil have high elastic modulus and specific elasticity, but have poor moldability. It was scarce and extremely expensive.
本発明は以上のような金属箔を用いたスピーカ用振動板
に代って高弾性を有し、軽量で成形性に殴れ、しかも脆
弱性を改良したスピーカ用振動板を提供するスピーカ用
振動板の製造法に関するものである。The present invention provides a speaker diaphragm that provides a speaker diaphragm that has high elasticity, is lightweight, has good moldability, and has improved brittleness, in place of the speaker diaphragm using metal foil as described above. This relates to a manufacturing method.
以下、本発明の実施例を図面第１図〜第３図により説明
する。Embodiments of the present invention will be described below with reference to FIGS. 1 to 3 of the drawings.
まず、第１図，第２図に示すように、フェノール，クレ
ゾール，フロロフェノールなどの変成フェノールとホル
ムアルデヒドを代表とするアルデヒド類とを重縮合して
得られるノボラック樹脂からなるフェノール系繊維の不
織布または織物を基材１とし、この基材１に、剛性の良
好なＳＩＣ，Ｎ２０３などのウィスカー繊維２を振動板
全重量の１０％以下の混合率で混入したフェノール，ク
レゾール’フロロフェノールなどの変性フェノールから
なるフェノール系樹脂３を含浸し、これを振動板形状に
加熱成形した後、無酸素あるいは不活性気体の雰囲気中
で徐々に昇温し、７０びＣ以上の高温で焼成炭化して第
３図に示すようなスピーカ用振動板を得る。First, as shown in Figures 1 and 2, a non-woven fabric of phenolic fibers or A modified phenol such as phenol, cresol, fluorophenol, etc. is prepared by using a textile as the base material 1, and mixing whisker fibers 2 such as SIC and N203 with good rigidity into the base material 1 at a mixing ratio of 10% or less of the total weight of the diaphragm. After impregnating the phenolic resin 3 consisting of the A speaker diaphragm as shown in the figure is obtained.
第３図において４１ま炭化された部分、２はウィスカー
繊維である。フェノール系繊維１とフェノール系樹脂３
とは化学構造式が類似し、加熱成形時に次のような反応
によって強固に結合される。In FIG. 3, 41 is a carbonized portion and 2 is whisker fiber. Phenolic fiber 1 and phenolic resin 3
The chemical structure is similar to that of , and they are strongly bonded by the following reaction during heat molding.
となる。becomes.
これを無酸素または不活性気体の雰囲気中にて徐々に昇
溢し焼成いくと下記のイｂ学構造によって炭化され結晶
の良好な炭化物ができる。When this is gradually heated and fired in an oxygen-free or inert gas atmosphere, it is carbonized to form a carbide with good crystalline structure according to the following Ib structure.
７００〜１４００００
上述のように焼成炭化されたスピーカ用振動板は優れた
剛性を有するものとなる。700 to 140,000 The speaker diaphragm that has been fired and carbonized as described above has excellent rigidity.
また、焼成する前の段階でゥィスカー繊維２を振動板全
重量の１０％以下、望ましくは５〜７％をフェノール系
樹脂に混入した状態にて振動板形状にて成形後、焼成炭
化して得られるスピーカ用振動板は脆弱性の改善された
ものとなる。ここで、本発明によるスピーカ用振動板、
全て炭化されたスピーカ用振動板、ベリリウム振動板の
脆弱性について耐衝撃試験によるシャルピー値を以下に
示す。In addition, the whisker fibers 2 are mixed with phenolic resin by 10% or less, preferably 5 to 7% of the total weight of the diaphragm at a stage before firing, and then molded into the shape of a diaphragm, and then fired and carbonized. The resulting speaker diaphragm has improved fragility. Here, a speaker diaphragm according to the present invention,
The Charpy values obtained from impact tests regarding the fragility of fully carbonized speaker diaphragms and beryllium diaphragms are shown below.
また、剛性については以下のようになった。In addition, the rigidity was as follows.
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、ベリリウム振動板以上の剛性を有し、しかも成形性
にも優れ、さらに、炭化物に見られる脆弱性も解消され
てきわめて高品質、高性能のスピーカ用振動板が提供で
き、生産性の点でも著しく優れたものとすることができ
、工業的価値の大なるものである。As described above, according to the method of manufacturing a speaker diaphragm of the present invention, it has a rigidity higher than that of a beryllium diaphragm, has excellent formability, and also eliminates the brittleness seen in carbides, resulting in extremely high quality. , it is possible to provide a high-performance speaker diaphragm, and it can be made extremely superior in terms of productivity, which 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
を示す加熱成形時の要部断面図、第２図は同拡大断面図
、第３図は同焼成炭化後の要部断面図である。
１・・・・・・基村、２・・・・・・ウィスカー繊維、
３・・・…フェノール系樹脂。
第１図
第２図
第３図Fig. 1 is a sectional view of the main part during heat forming, showing an example of the manufacturing method of the speaker diaphragm of the present invention, Fig. 2 is an enlarged sectional view of the same, and Fig. 3 is a sectional view of the main part after firing and carbonization. It is a diagram. 1... Motomura, 2... Whisker fiber,
3...Phenol resin. Figure 1 Figure 2 Figure 3
Claims (1)
この基材に剛性の良好なウイスカー繊維を混入したフエ
ノール系樹脂を含浸した後加熱成形し、これを無酸素ま
たは不活性気体の雰囲気中で徐々に昇温し７００℃以上
の高温で焼成炭化することを特徴とするスピーカ用振動
板の製造法。 ２ フエノール系繊維としてフエノール，クレゾール，
フロロフエノールなどの変成フエノールとホルムアルデ
ヒドを代表とするアルデヒド類とを重縮合して得られる
ノボラツク樹脂を用いることを特徴とする特許請求の範
囲第１項記載のスピーカ用振動板の製造法。 ３ フエノール系樹脂として、フエノール，クレゾール
，フロロフエノールなどの変成フエノール樹脂を用いる
ことを特徴とする特許請求の範囲第１項記載のスピーカ
用振動板の製造法。 ４ フエノール系樹脂に混入するウイスカー繊維の混入
率を全振動板重量の１０％以下としてなる特許請求の範
囲第１項記載のスピーカ用振動板の製造法。[Claims] 1. A nonwoven fabric or woven fabric made of phenolic fibers as a base material,
This base material is impregnated with a phenolic resin mixed with whisker fibers with good rigidity, then heated and molded, and then heated gradually in an oxygen-free or inert gas atmosphere and fired and carbonized at a high temperature of 700°C or higher. A method for manufacturing a speaker diaphragm characterized by the following. 2 As phenolic fibers, phenol, cresol,
2. A method for producing a speaker diaphragm according to claim 1, characterized in that a novolac resin obtained by polycondensing a modified phenol such as fluorophenol and an aldehyde represented by formaldehyde is used. 3. The method for manufacturing a speaker diaphragm according to claim 1, characterized in that a modified phenolic resin such as phenol, cresol, or fluorophenol is used as the phenolic resin. 4. The method for manufacturing a speaker diaphragm according to claim 1, wherein the proportion of whisker fibers mixed into the phenolic resin is 10% or less of the total weight of the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7002578A JPS6040756B2 (en) | 1978-06-09 | 1978-06-09 | Manufacturing method of speaker diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7002578A JPS6040756B2 (en) | 1978-06-09 | 1978-06-09 | Manufacturing method of speaker diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54161318A JPS54161318A (en) | 1979-12-20 |
| JPS6040756B2 true JPS6040756B2 (en) | 1985-09-12 |
Family
ID=13419639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7002578A Expired JPS6040756B2 (en) | 1978-06-09 | 1978-06-09 | Manufacturing method of speaker diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6040756B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4996119A (en) * | 1984-08-27 | 1991-02-26 | Kabushiki Kaisha Kenwood | Speaker cone plate and method of forming |
| JPS6165596A (en) * | 1984-09-06 | 1986-04-04 | Mitsubishi Pencil Co Ltd | Manufacture of glass type hard carbon acoustic equipment's oscillating plate |
| FR2656972B1 (en) * | 1990-01-11 | 1992-05-15 | Mitsubishi Pencil Co | PROCESS FOR THE PREPARATION OF A FULLY CARBON DIAPHRAGM FOR ACOUSTIC EQUIPMENT. |
| EP1644647B1 (en) | 2003-07-05 | 2006-10-18 | MAN B & W Diesel AG | Axial friction bearing |
-
1978
- 1978-06-09 JP JP7002578A patent/JPS6040756B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54161318A (en) | 1979-12-20 |
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