JPS6356759B2 - - Google Patents
Info
- Publication number
- JPS6356759B2 JPS6356759B2 JP13106480A JP13106480A JPS6356759B2 JP S6356759 B2 JPS6356759 B2 JP S6356759B2 JP 13106480 A JP13106480 A JP 13106480A JP 13106480 A JP13106480 A JP 13106480A JP S6356759 B2 JPS6356759 B2 JP S6356759B2
- Authority
- JP
- Japan
- Prior art keywords
- polyoxymethylene
- whiskers
- polyethylene
- synthetic pulp
- diaphragm
- 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
- -1 polyoxymethylene Polymers 0.000 claims description 43
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 26
- 229920006324 polyoxymethylene Polymers 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 description 17
- 229920000573 polyethylene Polymers 0.000 description 17
- 230000000704 physical effect Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 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
- 239000000155 melt Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 239000002861 polymer material Substances 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)
- Details Of Audible-Bandwidth Transducers (AREA)
Description
【発明の詳細な説明】
一般にスピーカ、ヘツドフオン、マイクロフオ
ン等の振動板、カートリツジのヘツドシエル、ト
ーンアーム、カートリツジのカンチレバー、スピ
ーカのキヤビネツト等の音響部品に要求される物
理特性の第１の条件はヤング率が高いことであ
る。ヤング率が高いと例えば振動板に於いては分
割振動を高い周波数に追いやることができる。最
近このヤング率を上げる為に炭素繊維、アルミナ
繊維等を使用する試みがなされているが、この炭
素繊維、アルミナ繊維は、バインダとして例えば
ポリエチレン等の熱可塑性繊維を使用したときに
はこのバインダとの濡れが悪く、これにより製造
された音響部品は極めてもろく、その強度が小さ
い欠点があると共にこの炭素繊維、アルミナ繊維
が有する良好な物理特性を十分に発揮できない不
都合があつた。DETAILED DESCRIPTION OF THE INVENTION In general, the first physical property condition required for acoustic parts such as diaphragms of speakers, headphones, microphones, etc., cartridge headshells, tone arms, cartridge cantilevers, and speaker cabinets is Young's. The ratio is high. If the Young's modulus is high, for example in a diaphragm, it is possible to drive the split vibration to a high frequency. Recently, attempts have been made to use carbon fibers, alumina fibers, etc. in order to increase this Young's modulus. However, the acoustic components manufactured using this method are extremely brittle and have the disadvantage of having low strength, as well as being unable to fully demonstrate the good physical properties of carbon fibers and alumina fibers.
一方通商産業省工業技術院繊維高分子材料研究
所で開発された方法により得られたポリオキシメ
チレン単結晶ウイスカはヤング率が略１×
1011N／m2で炭素繊維に匹敵する程大きく、しか
もこのポリオキシメチレン単結晶ウイスカは、ポ
リエチレン等の熱可塑性繊維のバインダとの濡れ
が良い。又このポリオキシメチレンのウイスカは
１点から放射状に無数の針が突出した形状のもの
であるからポリエチレン等との複合体の全ての物
理特性に方向性がない。 On the other hand, polyoxymethylene single crystal whiskers obtained by a method developed by the Institute of Textile and Polymer Materials, Agency of Industrial Science and Technology, Ministry of International Trade and Industry, have a Young's modulus of approximately 1×.
At 10 11 N/m 2 , this polyoxymethylene single crystal whisker is as large as carbon fiber and has good wettability with a thermoplastic fiber binder such as polyethylene. Furthermore, since this polyoxymethylene whisker has the shape of numerous needles protruding radially from one point, the physical properties of the composite with polyethylene etc. have no directionality.
本発明は斯るポリオキシメチレンのウイスカを
用いた音響部品の製造方法に関し、特にこのポリ
オキシメチレンのウイスカの物理特性を十分に発
揮できる様にしたものである。 The present invention relates to a method of manufacturing an acoustic component using such a polyoxymethylene whisker, and in particular, to a method that allows the physical properties of this polyoxymethylene whisker to be fully exhibited.
以下図面を参照しながら本発明ポリオキシメチ
レンのウイスカを用いた音響部品の製造方法をス
ピーカの振動板の製造方法に適用した例につき説
明しよう。 An example in which the method for manufacturing an acoustic component using polyoxymethylene whiskers of the present invention is applied to a method for manufacturing a diaphragm for a speaker will be described below with reference to the drawings.
本例に於いては第１図に示す如く底面１ａが細
網状に構成された所定形状の容器１を用意し、こ
の容器１の底面に蓋２を設けて、この容器１に所
定量の水３を注入すると共にこの水３の中に重量
比50％の割合でポリオキシメチレンのウイスカ４
とポリエチレン系合成パルプ５とを入れ、その後
この水３を撹拌してこのポリオキシメチレンのウ
イスカ４とポリエチレン系合成パルプ５とを混合
し、その後第２図に示す如くこの容器１の底面１
ａに設けられた蓋２を除去して、水３をこの底面
１ａの網目を通して除去して抄造する。この場合
容器１の底面１ａ上にポリオキシメチレンのウイ
スカ４とポリエチレン系合成パルプ５とが混合し
た抄造シート６が得られる。この抄造シート６を
熱プレス圧縮成型機７で成形してスピーカの振動
板形状とする。この場合熱プレス圧縮成型機７の
温度は、ポリエチレン系合成パルプ５が溶融する
温度で且つポリオキシメチレンのウイスカ４が軟
化しない温度、即ちポリオキシメチレンのウイス
カ４の軟化点は180℃〜190℃であるので、この温
度以下でポリエチレン系合成パルプ５が溶融する
温度、例えば130℃〜150℃とする。 In this example, as shown in FIG. 1, a container 1 having a predetermined shape with a reticular bottom surface 1a is prepared, a lid 2 is provided on the bottom surface of the container 1, and a predetermined amount of water is poured into the container 1. At the same time, polyoxymethylene whiskers 4 are injected into the water 3 at a weight ratio of 50%.
and polyethylene-based synthetic pulp 5, and then the water 3 is stirred to mix the polyoxymethylene whiskers 4 and the polyethylene-based synthetic pulp 5, and then the bottom surface 1 of this container 1 is poured as shown in FIG.
The lid 2 provided on the bottom surface 1a is removed and the water 3 is removed through the mesh on the bottom surface 1a to form paper. In this case, a paper sheet 6 in which polyoxymethylene whiskers 4 and polyethylene synthetic pulp 5 are mixed is obtained on the bottom surface 1a of the container 1. This paper sheet 6 is molded using a hot press compression molding machine 7 to form a diaphragm shape for a speaker. In this case, the temperature of the hot press compression molding machine 7 is a temperature at which the polyethylene synthetic pulp 5 melts and at which the polyoxymethylene whiskers 4 do not soften, that is, the softening point of the polyoxymethylene whiskers 4 is 180°C to 190°C. Therefore, the temperature is set below this temperature at which the polyethylene synthetic pulp 5 melts, for example, 130°C to 150°C.
本例により製造されたスピーカの振動板はポリ
オキシメチレンのウイスカ４をバインダとしての
ポリエチレン系合成パルプ５が溶融し、結合した
もの即ちポリエチレン系合成パルプのフイルム内
にポリオキシメチレンのウイスカを含ませたもの
となる。この振動板の物性を振動リード法により
測定した結果は以下の通りであつた。 The diaphragm of the speaker manufactured in this example is made by melting and bonding polyoxymethylene whiskers 4 with polyethylene synthetic pulp 5 as a binder, that is, containing polyoxymethylene whiskers in a film of polyethylene synthetic pulp. It becomes something. The physical properties of this diaphragm were measured by the vibration lead method, and the results were as follows.
共振鋭度(Q) 21.0
ヤング率(N/m2) 3.5×109
密度(Kg/m3) 850
縦波伝播速度(m/S) 2030
これに対し一般的な振動板の材料であるポリエ
チレン系合成パルプより成る振動板の特性は以下
の通りである。 Resonance sharpness (Q) 21.0 Young's modulus (N/m 2 ) 3.5×10 9 density (Kg/m 3 ) 850 Longitudinal wave propagation velocity (m/S) 2030 In contrast, polyethylene, which is a common diaphragm material The characteristics of the diaphragm made of synthetic pulp are as follows.
共振鋭度(Q) 16.0
ヤング率(N/m2) 1.6×109
密度(Kg/m3) 900
縦波伝播速度(m/S) 1330
これを比較するに本発明に依り製造された振動
板は音響特性としては共振鋭度Ｑは多少劣るが、
その他の点では全て改善されている。特にヤング
率は２倍以上となり、強化振動板を得ることがで
きると共に縦波伝播速度も大幅に改善されてい
る。又、このポリオキシメチレンのウイスカはポ
リエチレン系合成パルプとの濡れが良く強固な振
動板を得ることができ、ポリオキシメチレンのウ
イスカの有する良好な物理特性を十分に発揮させ
ることができる。更にこのポリオキシメチレンの
ウイスカは１点から放射状に無数の針が突出した
形状のものであるから複合体の物理特性に方向性
がなく音響特性として有利である。 Resonance sharpness (Q) 16.0 Young's modulus (N/m 2 ) 1.6×10 9 density (Kg/m 3 ) 900 Longitudinal wave propagation velocity (m/S) 1330 In comparison, the vibration manufactured according to the present invention Although the acoustic characteristics of the board are somewhat inferior in resonance sharpness Q,
All other aspects have been improved. In particular, the Young's modulus is more than doubled, making it possible to obtain a reinforced diaphragm, and the longitudinal wave propagation velocity is also significantly improved. In addition, the polyoxymethylene whiskers have good wettability with polyethylene synthetic pulp, making it possible to obtain a strong diaphragm, and fully exhibiting the good physical properties of the polyoxymethylene whiskers. Furthermore, since this polyoxymethylene whisker has the shape of numerous needles protruding radially from one point, the physical properties of the composite have no directionality, which is advantageous in terms of acoustic properties.
又上述実施例では抄造シート６を直接熱プレス
する如く述べたが、この抄造シート６を第４図に
示す如く例えば130℃〜150℃のカレンダロール８
を通してフイルム６ａ化し、このフイルム６を第
５図に示す如く圧空成型機９で振動板形状に成形
する様にしても良い。この場合に於いても上述同
様の作用効果が得られることは容易に理解できよ
う。 Further, in the above embodiment, it was described that the paper sheet 6 was directly hot pressed, but this paper sheet 6 was heated with a calender roll 8 at 130°C to 150°C, for example, as shown in FIG.
It is also possible to form a film 6a through the film 6a, and to form the film 6 into the shape of a diaphragm using a pneumatic molding machine 9 as shown in FIG. It is easy to understand that the same effects as described above can be obtained in this case as well.
又ポリオキシメチレンのウイスカとポリエチレ
ン系合成パルプとの配合の割合についてである
が、バインダとしてのポリエチレン系合成パルプ
が30重量％より少ないときは部品の強度が保持で
きなくなるので、このポリエチレン系合成パルプ
の割合は30重量％以上が良く、又ポリオキシメチ
レンのウイスカは10重量％より少ないときはポリ
オキシメチレンのウイスカの有する良好な物理特
性が顕著に現われないでこのポリオキシメチレン
のウイスカの割合は10重量％以上が良い。即たポ
リオキシメチレンのウイスカは10〜70重量％、ポ
リエチレン系合成パルプは90〜30重量％の割合の
範囲が有効であつた。 Regarding the blending ratio of polyoxymethylene whiskers and polyethylene synthetic pulp, if the content of polyethylene synthetic pulp as a binder is less than 30% by weight, the strength of the parts cannot be maintained. The proportion of polyoxymethylene whiskers is preferably 30% by weight or more, and when the proportion of polyoxymethylene whiskers is less than 10% by weight, the good physical properties of polyoxymethylene whiskers do not appear significantly. 10% by weight or more is good. It was effective to use a ratio of 10 to 70% by weight for polyoxymethylene whiskers and 90 to 30% by weight for polyethylene synthetic pulp.
尚、上述実施例に於いては本発明をスピーカの
振動板を製造する例につき述べたが、本発明によ
れば上述の如く音響特性が勝れているので、スピ
ーカの振動板に限らずマイクロフオン、ヘツドフ
オンの振動板、カートリツジのヘツドシエル、ト
ーンアーム、カートリツジのカンチレバー、スピ
ーカのキヤビネツト等の音響部品の製造方法に適
用できる。 In the above-described embodiments, the present invention has been described with reference to manufacturing a speaker diaphragm, but since the present invention has superior acoustic characteristics as described above, it can be used not only for speaker diaphragms but also for micro-microphones. The present invention can be applied to the manufacturing method of acoustic components such as diaphragms of phonographs, headphone diaphragms, cartridge headshells, tone arms, cartridge cantilevers, and speaker cabinets.
又上述実施例ではポリエチレン系合成パルプを
使用したが、この代りにポリエチレン繊維、ポリ
プロ繊維、ポリアクリロニトリル繊維等の熱可塑
性繊維が使用できることは容易に理解できよう。 Furthermore, although polyethylene synthetic pulp was used in the above embodiments, it is easily understood that thermoplastic fibers such as polyethylene fibers, polyprofibers, polyacrylonitrile fibers, etc. can be used instead.
又上述実施例では湿式で抄造したが、この代り
に乾式で抄造するようにしても良いことは勿論で
ある。 Further, in the above-described embodiments, the paper-making process was carried out by a wet process, but it goes without saying that the paper-making process may be carried out by a dry process instead.
又本発明は上述実施例に限らず、本発明の要旨
を逸脱することなく、その他種々の構成が取り得
ることは勿論である。 Moreover, the present invention is not limited to the above-described embodiments, and it goes without saying that various other configurations can be taken without departing from the gist of the present invention.
第１図、第２図及び第３図は夫々本発明ポリオ
キシメチレンのウイスカを用いた音響部品の製造
方法の一実施例の説明に供する線図、第４図及び
第５図は夫々本発明の他の実施例の説明に供する
線図である。
４はポリオキシメチレンのウイスカ、５はポリ
エチレン系合成パルプ、６は抄造シート、７は熱
プレス圧縮成型機である。
FIGS. 1, 2, and 3 are diagrams for explaining an embodiment of the method of manufacturing an acoustic component using polyoxymethylene whiskers of the present invention, and FIGS. 4 and 5 are diagrams, respectively, of the present invention. FIG. 6 is a diagram for explaining another embodiment of the present invention. 4 is a polyoxymethylene whisker, 5 is a polyethylene synthetic pulp, 6 is a paper sheet, and 7 is a hot press compression molding machine.
Claims (1)
カとを混合して抄造し、該抄造体をポリオキシメ
チレンの軟化点より低い温度で上記熱可塑性繊維
を溶融すると共に成形する様にしたことを特徴と
するポリオキシメチレンのウイスカを用いた音響
部品の製造方法。1. Thermoplastic fibers and polyoxymethylene whiskers are mixed to form a paper, and the paper product is molded while melting the thermoplastic fibers at a temperature lower than the softening point of polyoxymethylene. A method for manufacturing acoustic components using polyoxymethylene whiskers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13106480A JPS5755695A (en) | 1980-09-20 | 1980-09-20 | Manufacture of acoustic parts using whisker of polyoxymethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13106480A JPS5755695A (en) | 1980-09-20 | 1980-09-20 | Manufacture of acoustic parts using whisker of polyoxymethylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5755695A JPS5755695A (en) | 1982-04-02 |
| JPS6356759B2 true JPS6356759B2 (en) | 1988-11-09 |
Family
ID=15049157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13106480A Granted JPS5755695A (en) | 1980-09-20 | 1980-09-20 | Manufacture of acoustic parts using whisker of polyoxymethylene |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5755695A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101223124B (en) | 2005-07-14 | 2011-05-04 | 大赛璐化学工业株式会社 | Process for producing carboxylic acid |
| JP2020065145A (en) * | 2018-10-16 | 2020-04-23 | セイコーエプソン株式会社 | Loudspeaker diaphragm, loudspeaker, and method of manufacturing loudspeaker diaphragm |
-
1980
- 1980-09-20 JP JP13106480A patent/JPS5755695A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5755695A (en) | 1982-04-02 |
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