JPH0468998A - Manufacture of diaphragm for speaker - Google Patents
Manufacture of diaphragm for speakerInfo
- Publication number
- JPH0468998A JPH0468998A JP18083690A JP18083690A JPH0468998A JP H0468998 A JPH0468998 A JP H0468998A JP 18083690 A JP18083690 A JP 18083690A JP 18083690 A JP18083690 A JP 18083690A JP H0468998 A JPH0468998 A JP H0468998A
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- diaphragm
- speaker
- internal loss
- epoxy resin
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000010445 mica Substances 0.000 claims abstract description 20
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 20
- 239000003822 epoxy resin Substances 0.000 claims abstract description 15
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003623 enhancer Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000982 direct dye Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は主に音響機器に組込まれるスピーカに用いられ
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 Field of the Invention The present invention relates to a method of manufacturing a speaker diaphragm used primarily for speakers incorporated in audio equipment.
従来の技術
集成マイカを混合抄紙したスピーカ用振動板は過去にも
開発され生産されているが、スピーカ用振動板として要
求される比弾性率（ヤング率／比重）、内部損失（ｔａ
ｎδ）の両物理特性を満足するものはなかった。従来は
、集成マイカ１００％の抄紙材料を乾燥した振動板にエ
ポキシ樹脂等の熱硬化性樹脂を含浸し、加熱乾燥する方
法と、集成マイカのアスペクト比の比較的高いものを、
パルプとバインダーを混合して、抄紙、加熱プレス等の
手段を経て、スピーカ用振動板を得ていた。表１に本発
明のスピーカ用振動板尚１と従来のスピーカ用振動板Ｎ
ｎ２〜ＮＱ４の物理特性を比較した。隘２のスピーカ用
振動板は平均アスペクト比２５０の集成マイカ５０％（
重量比）とパルプ材料として、Ｎ、ＵＫＰ、叩解度５Ｒ
２０度を５０％（重量比〉混合抄紙し、加熱プレス乾燥
後、分子量３８０の浸透性の良好なエポキシ樹脂を総重
量に対し、１０％含浸し熱処理したものである。ｒＩ！
：Ｉ３はＮｎ２の集成マイカとパルプを各５０％の重量
比で混合し紙力増強剤として、ポリアクリルアミド系の
アニオン性樹脂を集成マイカとパルプの総重量に対し、
２％配合し硫酸アルミニウムにて定着したものである。A combination of conventional technologies Speaker diaphragms made from paper mixed with mica have been developed and produced in the past, but the specific elastic modulus (Young's modulus/specific gravity) and internal loss (ta) required for speaker diaphragms are
There was no material that satisfied both physical properties of nδ). Conventionally, the method of impregnating a diaphragm made of 100% laminated mica papermaking material with a thermosetting resin such as epoxy resin and heating and drying it, and the method of laminated mica with a relatively high aspect ratio.
A speaker diaphragm was obtained by mixing pulp and a binder and passing through paper making, hot pressing, and other means. Table 1 shows the speaker diaphragm N of the present invention and the conventional speaker diaphragm N.
The physical properties of n2 to NQ4 were compared. The speaker diaphragm in room 2 is made of 50% laminated mica with an average aspect ratio of 250 (
Weight ratio) and pulp material: N, UKP, beating degree 5R
The paper is made by mixing 50% (weight ratio) of 20 degrees Celsius, and after drying under heat press, it is impregnated with 10% of the total weight of an epoxy resin with good permeability having a molecular weight of 380 and heat treated.rI!
: I3 is a mixture of Nn2 aggregate mica and pulp at a weight ratio of 50% each, and polyacrylamide-based anionic resin as a paper strength enhancer based on the total weight of aggregate mica and pulp.
2% and fixed with aluminum sulfate.
嵐４は針葉樹の未晒クラフトパルプ（Ｎ、ＵＫＰ）１０
０％で叩解度５Ｒ２０度にて隔２と同じ紙力増強剤とパ
インダ−を同量配合し、抄紙後加熱プレスしたものであ
る。尚４は平均アスペクト比２５０の集成マイカ１００
％の振動板に、分子量３８０の浸透性の良いエポキシ樹
脂を総重量に対し１０％含浸し熱処理したものである。Arashi 4 is softwood unbleached kraft pulp (N, UKP) 10
0%, a freeness of 5R, 20 degrees, the same amount of paper strength enhancer and binder as in Section 2 were blended, and the paper was heated and pressed after paper making. Note 4 is laminated mica 100 with an average aspect ratio of 250.
% diaphragm was impregnated with 10% of the total weight of a highly permeable epoxy resin having a molecular weight of 380 and heat-treated.
表１の比弾性率、内部損失の点においてＮｂ２．Ｎ１３
は、分子量の低いエポキシを使用しているため振動板全
体にエポキシ樹脂が浸透硬化し、結合強度が増すため、
比弾性率は向上するが内部損失が低くなり、歪率の点に
おいて不利な振動板である。In terms of specific elastic modulus and internal loss in Table 1, Nb2. N13
Because the epoxy resin uses low molecular weight epoxy, the epoxy resin penetrates and hardens throughout the diaphragm, increasing the bonding strength.
Although the specific modulus of elasticity is improved, the internal loss is low, making this a diaphragm disadvantageous in terms of distortion rate.
発明が解決しようとする課題
前述したように従来のスピーカ用振動板の製造法では、
比弾性率、内部損失の高いものが得られず、特に紙や増
強剤であるマイカを配合することは比弾性率の向上には
効果はあるが、パルプ特有の内部損失を維持することが
難しいものであった。Problems to be Solved by the Invention As mentioned above, in the conventional manufacturing method of speaker diaphragms,
It is not possible to obtain a material with high specific elastic modulus and internal loss, and although adding paper or mica as a reinforcing agent is effective in improving the specific elastic modulus, it is difficult to maintain the internal loss characteristic of pulp. It was something.
本発明はこのような従来の欠点を除去し、比弾性率に優
れ、しかも内部損失の大きい安定したスピーカ用振動板
を提供するこ七を目的とするものである。It is an object of the present invention to eliminate such conventional drawbacks and to provide a stable speaker diaphragm having an excellent specific modulus of elasticity and a large internal loss.
課題を解決するための手段
上記課題を解決するような方法として本発明はアスペク
ト比の比較的高いマイカをパルプと混合抄紙した後、パ
ルプのもつ高内部損失を維持するためにスピーカ用振動
板の表皮部分をできる限り機械強度を向上させて、スピ
ーカ用振動板の厚み方向の中心部分をパルプ及びマイカ
との結合強度を小さくして内部損失を１与る方法とした
ものである。Means for Solving the Problems As a method for solving the above problems, the present invention involves mixing mica with a relatively high aspect ratio with pulp to make paper, and then creating a speaker diaphragm in order to maintain the high internal loss of the pulp. The method is to improve the mechanical strength of the skin part as much as possible, and to reduce the bonding strength between the pulp and mica at the central part in the thickness direction of the speaker diaphragm, thereby giving an internal loss of 1.
作用
上記方法とすることにより、十分な内部損失をもった安
定した特性のスピーカ用振動板を提供できることになる
。Effect: By using the above method, it is possible to provide a speaker diaphragm with sufficient internal loss and stable characteristics.
実施例
以下、本発明の実施例について説明する。すなわち、本
発明は集成マイカのアスペクト比１００〜４００をパル
プと混合抄紙し、加熱プレスにて乾燥した後、分子量１
０００〜２０００のエポキシ樹脂を含浸し、乾燥して第
１図に示すようなコーン状のスピーカ用振動板とし、こ
のスピーカ用振動板の周縁部にフリーエツジ２を貼付け
て構成する。次に、本発明の具体的な一例を述べる。Examples Examples of the present invention will be described below. That is, in the present invention, paper is made by mixing aggregate mica with an aspect ratio of 100 to 400 and pulp, and after drying with a hot press, the molecular weight is 1.
It is impregnated with 000 to 2000 epoxy resin and dried to form a cone-shaped speaker diaphragm as shown in FIG. 1, and a free edge 2 is attached to the periphery of this speaker diaphragm. Next, a specific example of the present invention will be described.
・パルプ：Ｎ、ＵＫＰ ５０％（重量パーセント）・
マイカ：平均アスペクト比２５０
（１００〜４００）５０％（重量パーセント）・ダイレ
クト染料：
３％（パルプ、マイカ総重量に対し）
・定着剤：硫酸アルミニウム３％
（パルプ、マイカ総重量に対し）
・エポキシ樹脂：分子量１０００
（ＭＥＫ希釈１５％溶剤）
本発明は前述したように、比弾性率を向上させ、かつ内
部損失を損なわないスピーカ用振動板であり、アスペク
ト比の高いマイカをパルプと配合抄紙しプレス成型、乾
燥等の手段により振動板の形状を得、分子量の高いエポ
キシ樹脂を含浸することによりエポキシ樹脂自体の粘度
が増すため振動板を構成する集成マイカ、パルプ繊維間
の隙間に浸透しにくい状態となり結果、特に第２図に示
すような表皮部分１ａ、ｌｂを形成し振動板の中心部１
ｃは極微量のエポキシ樹脂が含浸された状態になり、表
皮部分１ａ、ｌｂに弾性率の高い複合材が構成され、中
心部１ｃは損失の高いパルプ基材の特性を維持した構成
となるものである。・Pulp: N, UKP 50% (weight percent)・
Mica: Average aspect ratio 250 (100-400) 50% (weight percent) ・Direct dye: 3% (based on the total weight of pulp and mica) ・Fixer: Aluminum sulfate 3% (based on the total weight of pulp and mica) ・Epoxy resin: molecular weight 1000 (MEK diluted 15% solvent) As mentioned above, the present invention is a speaker diaphragm that improves the specific elastic modulus and does not impair internal loss, and is made by mixing mica with a high aspect ratio with pulp. The shape of the diaphragm is obtained by means such as press molding and drying, and by impregnating it with a high molecular weight epoxy resin, the viscosity of the epoxy resin itself increases, so it penetrates into the gaps between the laminated mica and pulp fibers that make up the diaphragm. As a result, the skin parts 1a and lb as shown in FIG. 2 are formed, and the center part 1 of the diaphragm
c is impregnated with a very small amount of epoxy resin, the skin parts 1a and lb are composed of a composite material with a high elastic modulus, and the central part 1c has a composition that maintains the characteristics of a pulp base material with high loss. It is.
表１の嵐１に本発明の実施例の比弾性率と内部損失を示
している。Arashi 1 in Table 1 shows the specific elastic modulus and internal loss of the example of the present invention.
（以 下 余 白）
第３図のａの周波数特性が示すようなピーク・デイツプ
の少ないフラットで高域限界の伸びた性能が得られた。(Left below) As shown in the frequency characteristics of a in Figure 3, flat performance with few peaks and dips and an extended high frequency limit were obtained.
ｂは従来の分子量（表１．Ｎ１２の材料および製造法）
３８０のエポキシ樹脂を含浸したスピーカ用振動板の周
波数特性を示す。b is the conventional molecular weight (Table 1. N12 materials and manufacturing method)
380 shows the frequency characteristics of a speaker diaphragm impregnated with 380 epoxy resin.
発明の効果
本発明は以上の如く集成マイカのアスペクト比の高いも
のをパルプと混合抄紙し、浸透性の少ない分子量１００
０以上のエポキシ樹脂にて硬化させることにより、スピ
ーカの周波数特性（音質）を大幅に改善できるものであ
る。Effects of the Invention As described above, the present invention produces paper by mixing aggregated mica with a high aspect ratio with pulp, and produces paper with a molecular weight of 100 with low permeability.
By curing with 0 or more epoxy resin, the frequency characteristics (sound quality) of the speaker can be significantly improved.
第１図は本発明の一実施例によるスピーカ用振動板の製
造法により製造したスピーカ用振動板のの断面図、第２
図は同要部の拡大断面図、第３図は本発明と従来のスピ
ーカ用振動板を用いたスピーカの周波数特性図である。
１・・・・・・スピーカ用振動板、１ａ、１ｂ・・・・
・・表皮部分、ｌｃ・・・・・・中心部。FIG. 1 is a sectional view of a speaker diaphragm manufactured by a method for manufacturing a speaker diaphragm according to an embodiment of the present invention, and FIG.
The figure is an enlarged sectional view of the same main part, and FIG. 3 is a frequency characteristic diagram of a speaker using the present invention and a conventional speaker diaphragm. 1...Speaker diaphragm, 1a, 1b...
... Epidermal part, lc... Central part.
Claims (1)
合抄紙し、加熱プレスにて乾燥した後、分子量１０００
〜２０００のエポキシ樹脂を含浸し、乾燥することを特
徴とするスピーカ用振動板の製造法。A composite mica with an aspect ratio of 100 to 400 is mixed with pulp to make paper, and after drying in a heated press, the molecular weight is 1000.
A method for manufacturing a speaker diaphragm, characterized by impregnating it with an epoxy resin of ~2000 and drying it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18083690A JP2932625B2 (en) | 1990-07-09 | 1990-07-09 | Manufacturing method of speaker diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18083690A JP2932625B2 (en) | 1990-07-09 | 1990-07-09 | Manufacturing method of speaker diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0468998A true JPH0468998A (en) | 1992-03-04 |
| JP2932625B2 JP2932625B2 (en) | 1999-08-09 |
Family
ID=16090210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18083690A Expired - Fee Related JP2932625B2 (en) | 1990-07-09 | 1990-07-09 | Manufacturing method of speaker diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2932625B2 (en) |
-
1990
- 1990-07-09 JP JP18083690A patent/JP2932625B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2932625B2 (en) | 1999-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4291781A (en) | Speaker diaphragm and method of preparation of the same | |
| US3935924A (en) | Vibratory material of paper pulp and carbon fibers | |
| US11432072B2 (en) | Speaker diaphragm and production method thereof | |
| JPH0468998A (en) | Manufacture of diaphragm for speaker | |
| JP5499721B2 (en) | Manufacturing method of speaker diaphragm and speaker diaphragm manufactured by the manufacturing method of the speaker diaphragm | |
| JPS5816679B2 (en) | speaker horn | |
| JPH0156600B2 (en) | ||
| JP3942056B2 (en) | Method for manufacturing diaphragm for electroacoustic transducer | |
| JP2940095B2 (en) | Method of manufacturing diaphragm for speaker | |
| JPS58131895A (en) | Diaphragm for loudspeaker | |
| JP4278801B2 (en) | Speaker diaphragm | |
| JPH028475Y2 (en) | ||
| JPS61245791A (en) | Diaphragm for speaker | |
| JPH05328487A (en) | Speaker diaphragm and its production | |
| JPS5822916B2 (en) | Diaphragm for speaker | |
| JP4743108B2 (en) | Manufacturing method of speaker diaphragm, speaker diaphragm, and speaker using the same | |
| JP2767702B2 (en) | Voice coil bobbin | |
| JP3109296B2 (en) | Speaker diaphragm | |
| JPS5875398A (en) | Loud speaker diaphragm | |
| JPH0779496A (en) | Speaker | |
| JP2700314B2 (en) | Speaker diaphragm | |
| JPH07274283A (en) | Diaphragm for speaker and its manufacture | |
| JPH06303694A (en) | Speaker | |
| JPH0237757B2 (en) | ||
| DE837114C (en) | Speaker cone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090528 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100528 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |