JPH0312517B2 - - Google Patents
Info
- Publication number
- JPH0312517B2 JPH0312517B2 JP3773182A JP3773182A JPH0312517B2 JP H0312517 B2 JPH0312517 B2 JP H0312517B2 JP 3773182 A JP3773182 A JP 3773182A JP 3773182 A JP3773182 A JP 3773182A JP H0312517 B2 JPH0312517 B2 JP H0312517B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- core material
- diaphragm
- pattern
- speaker
- 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
- 239000011162 core material Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 229920005992 thermoplastic resin Polymers 0.000 claims description 10
- 239000010408 film Substances 0.000 description 13
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920001230 polyarylate Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000013585 weight reducing agent 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
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
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】
本発明は熱可塑性樹脂フイルムを真空、圧空あ
るいは真空圧空成形してなる多数の凹凸を有する
心材の表面に表面材を貼り付けたスピーカ用振動
板の製造方法に関するものであり、その目的とす
るところは軽量化をあまり疎害することなく強度
を増大することができるスピーカ用振動板の製造
方法を提供することにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a diaphragm for a speaker, in which a surface material is attached to the surface of a core material having a large number of irregularities, which is formed by molding a thermoplastic resin film in vacuum, pressure, or vacuum pressure. The purpose is to provide a method of manufacturing a speaker diaphragm that can increase the strength without significantly compromising weight reduction.
一般に、スピーカ用振動板は紙パルプを抄造成
形したものが多く、振動板形状がコーン型であ
る。そのため、スピーカ振動板の内周部と外周部
では音源の位置が異なることになり、位相差がで
きるため周波数特性が平坦なスピーカを得にくい
欠点があつた。これに対し、振動板を平板とした
スピーカはコーン型スピーカに見られる前室効果
がなく、周波数特性を平坦とするのに有利であ
る。平板スピーカの場合、従来の紙を振動板とし
たとき、曲げに対する剛性が小さいため分割振動
が起こりやすく、広帯域にわたり平坦な特性が得
られない。平板で曲げ剛性を大きくするためには
サンドイツチ構造体が考えられる。これまでにア
ルミハニカムを心材としたサンドイツチ構造振動
板が多く使用されているが、アルミハニカムは製
造工程が複雑なためコスト高となり、普及型のス
テレオ装置、ラジオ受信機、テレビジヨン受像機
等のスピーカとして使用しにくいものである。ま
た、サンドイツチ構造の振動板を低コストで得る
ためには熱可塑性樹脂フイルムを真空、空圧ある
いは真空圧空成形により多数の凹凸を有した心材
とし、この心材の両面に表面材を貼り付けて振動
板とする方法がある。この場合、心材に表面材と
平行な部分ができるため表面材と2重になる部分
があり、重量点で効率的でない。そのため、振動
板としての重量を軽くして能率を高めるように成
形したフイルムの凸部分を切断している。 In general, most speaker diaphragms are made of paper pulp, and the diaphragm has a cone shape. Therefore, the position of the sound source is different between the inner circumference and the outer circumference of the speaker diaphragm, creating a phase difference, making it difficult to obtain a speaker with flat frequency characteristics. On the other hand, a speaker with a flat diaphragm does not have the front chamber effect seen in cone-shaped speakers, and is advantageous in flattening frequency characteristics. In the case of a flat plate speaker, when a conventional paper diaphragm is used as a diaphragm, split vibration tends to occur due to its low bending rigidity, making it impossible to obtain flat characteristics over a wide band. In order to increase the bending rigidity with a flat plate, a sandwich structure can be considered. Sandwich structure diaphragms made of aluminum honeycomb have been widely used so far, but aluminum honeycomb is expensive due to its complicated manufacturing process, and is used in popular stereo equipment, radio receivers, television receivers, etc. It is difficult to use as a speaker. In addition, in order to obtain a diaphragm with a sanderch structure at low cost, a thermoplastic resin film is made into a core material with many irregularities by vacuum, air pressure, or vacuum pressure forming, and a surface material is pasted on both sides of this core material to vibrate. There is a way to make it into a board. In this case, since the core material has a portion parallel to the surface material, there is a portion that overlaps with the surface material, which is not efficient in terms of weight. Therefore, the convex portions of the formed film are cut to reduce the weight of the diaphragm and increase efficiency.
第1図に従来のスピーカ用振動板の製造方法を
示す。第1図において、1は熱可塑性樹脂フイル
ム、2は成形金型である。その成形金型2は凹凸
パターンを有すると共にその凹部底面に吸引穴を
有する第1の金型3と、この第1の金型3の凹凸
パターンと同じのパターンでかつ上記凹部と同じ
大きさの貫通孔を有する第2の金型4の重ね合せ
体で構成されている。そして、この製造方法では
第1図aに示すように上述した成形金型2に予じ
め加熱して軟化させた熱可塑性樹脂フイルム1を
対向させ、この状態で第1図bに示すように吸引
し、上記第1、第2の金型3,4の組み合せでな
る成形金型2により上記熱可塑性樹脂フイルムを
成形し、第1図cに示すように第1の金型3を取
りはずしてから第2の金型4から突出したフイル
ムの凸部分を第2の金型4にそつてナイフ刃等に
より切断し、その後第1図dに示すように心材5
の両面に表面材6,7を接着する。しかしなが
ら、この方法によると、振動板の重量低減はでき
るが、切断した心材端面がきわめて薄いフイルム
であるため表面材との接着面積が小さく、接着強
度も弱い。このため、スピーカとしての信頼性が
十分確保できないという問題があつた。 FIG. 1 shows a conventional method of manufacturing a speaker diaphragm. In FIG. 1, 1 is a thermoplastic resin film, and 2 is a mold. The molding die 2 has a concavo-convex pattern and a first die 3 having suction holes at the bottom of the concave portion, and a first die 3 having a concavo-convex pattern and a concave-convex pattern having the same pattern as the concave portion and the same size as the concave portion. It is composed of a stack of second molds 4 having through holes. In this manufacturing method, as shown in FIG. 1a, the thermoplastic resin film 1, which has been softened by heating in advance, is placed facing the above-mentioned molding die 2, and in this state, as shown in FIG. 1b, The thermoplastic resin film is molded using a mold 2 consisting of a combination of the first and second molds 3 and 4, and the first mold 3 is removed as shown in FIG. 1c. The convex portion of the film protruding from the second mold 4 is cut along the second mold 4 with a knife blade or the like, and then the core material 5 is cut as shown in FIG.
Surface materials 6 and 7 are adhered to both sides of the surface. However, although this method allows the weight of the diaphragm to be reduced, since the cut end face of the core material is an extremely thin film, the adhesive area with the surface material is small and the adhesive strength is weak. For this reason, there was a problem that sufficient reliability as a speaker could not be ensured.
本発明はこのような従来の欠点を除去するもの
であり、凹凸のパターンを有する第1金型と、こ
の第1の金型と同じパターンで第1金型の凹部の
幅より広い貫通穴を有する第2金型を組み合わ
せ、全体として凹部が2段になる成形金型を備
え、この成形金型により熱可塑性樹脂フイルムを
真空、圧空あるいは真空圧空成形にして多数の凹
凸を有する心材を成形し、上記成形金型の第2金
型を成形した心材と共に取り出したのちに上記第
2金型より突出する心材の凸部を切断して除去し
表面材と平行になる部分を一部残した心材を形成
し、その後、上記心材の両面に表面材を貼り合わ
せるようにしたものである。かかる製造方法によ
れば、2段に成形された心材の第2金型から突出
した部分を当該第2金型にそつて切断することに
より、表面材と平行となる部分の一部をのりしろ・・・
・
として残し、同時に不要部分を除去することがで
きるため、軽量化おあまり疎害することなく強度
を増大することができる利点を有する。 The present invention eliminates such conventional drawbacks, and includes a first mold having an uneven pattern and a through hole having the same pattern as the first mold but wider than the width of the concave portion of the first mold. A second mold is combined with a second mold having two concave sections as a whole, and the thermoplastic resin film is vacuum-, pressure-, or vacuum-press-formed using this mold to form a core material having a large number of irregularities. , after taking out the second mold of the molding mold together with the molded core material, the convex part of the core material protruding from the second mold is cut and removed, leaving a part of the core material parallel to the surface material. After that, surface materials are bonded to both sides of the core material. According to this manufacturing method, by cutting the part of the core material molded in two stages that protrudes from the second mold along the second mold, a part of the part parallel to the surface material is pasted.・・・
・
Because it is possible to remove unnecessary parts at the same time, it has the advantage of increasing strength without reducing weight or causing too much damage.
以下、本発明のスピーカ用振動板の製造方法に
ついて実施例の図面と共に説明する。 Hereinafter, a method for manufacturing a speaker diaphragm according to the present invention will be described with reference to drawings of embodiments.
第2図および第3図は本発明の一実施例を示し
ており、第2図および第3図において、11は熱
可塑性樹脂フイルム、12は成形金型である。こ
の成形金型12は、凹凸部でなる所定のパターン
を有すると共にその凹部の底面に吸引穴13を有
する第1金型14と、この第1金型14の所定の
パターンと同じパターンでかつ上記第1金型14
の凹部の幅より広い貫通穴15を有する第2金型
16の組み合せで構成されており、全体として2
段の凹部17を有している。ここで、上記成形金
型12の凹凸部でなる所定パターンは第3図に示
すように放射方向に拡開する凹部17と凸部18
を円周方向に交互に配列したものであり、その凹
部17が2段構造となつている。 FIGS. 2 and 3 show an embodiment of the present invention. In FIGS. 2 and 3, 11 is a thermoplastic resin film, and 12 is a mold. This molding die 12 includes a first die 14 having a predetermined pattern of concavo-convex portions and a suction hole 13 at the bottom of the concave portion, and a first die 14 having the same predetermined pattern as the predetermined pattern of the first die 14 and the above-mentioned pattern. First mold 14
The second mold 16 has a through hole 15 wider than the width of the recess.
It has a stepped recess 17. Here, the predetermined pattern consisting of the uneven parts of the molding die 12 is as shown in FIG.
are arranged alternately in the circumferential direction, and the recesses 17 have a two-stage structure.
具体的には、熱可塑性樹脂フイルム11として
厚さ100μmのポリアリレート樹脂フイルムを用
い、このポリアリレート樹脂フイルムを約350℃
に加熱し、軟化させた後に第2図aに示すように
成形金型の上に置き、この状態で第2図bに示す
ように吸引穴13から空気を吸引して放射方向に
拡開する凹凸を円周方向に交互に有するパターン
形状の心材19を成形した。その後、第2図cに
示すように第2金型16を成形した心材19と共
に取り出してから切断線Aにそつて第2金型16
から突出した心材19の凸部をナイフ刃により切
断し、直径28mmに切断した心材をとり出した。こ
の心材の重量は65mgであつた。尚、放射方向に拡
開する凹凸部を円周方向に交互に配列した凹凸パ
ターンを有する金型で真空成形する従来の成形法
による心材の重量は74mgであつた。この比較から
も明らかなように本実施例の心材は従来の成形法
による心材にくらべて軽量となつている。次に、
厚み20μmのAl箔を表面材20,21とし、接着
剤としてポリエステル系フイルム接着剤(厚み
30μm)を用い、上記心材に加熱、加圧接着して
振動板とした。この時の表面材と心材間の剥離強
度は750gであつた。また従来の心材切断法によ
り成形した心材5を用い、同様な方法で振動板を
作製し、表面材と心材間の剥離強度を測定した。
その結果、剥離強度は150gであつた。 Specifically, a polyarylate resin film with a thickness of 100 μm is used as the thermoplastic resin film 11, and this polyarylate resin film is heated at approximately 350°C.
After heating it to soften it, it is placed on a mold as shown in Figure 2a, and in this state it is expanded in the radial direction by sucking air through the suction holes 13 as shown in Figure 2b. A core material 19 having a pattern shape having concavities and convexities alternately in the circumferential direction was molded. Thereafter, as shown in FIG.
The convex portion of the core material 19 protruding from the core was cut with a knife blade, and the core material cut to a diameter of 28 mm was taken out. The weight of this heartwood was 65 mg. Incidentally, the weight of the core material obtained by the conventional vacuum forming method of vacuum forming using a mold having an uneven pattern in which uneven parts expanding in the radial direction are arranged alternately in the circumferential direction was 74 mg. As is clear from this comparison, the core material of this example is lighter than the core material produced by the conventional molding method. next,
Al foil with a thickness of 20 μm was used as the surface material 20 and 21, and polyester film adhesive (with a thickness of
30 μm), and was bonded to the core material under heat and pressure to form a diaphragm. The peel strength between the surface material and the core material at this time was 750 g. Further, a diaphragm was produced in the same manner using the core material 5 formed by the conventional core material cutting method, and the peel strength between the surface material and the core material was measured.
As a result, the peel strength was 150 g.
以上のように本発明によれば、心材の不要部を
除去できるとともに表面材との接着のための
のりしろ・・・・を設けることができるため、振動板の
軽
量化をあまり疎害することなく強度を増大するこ
とができ、高性能で信頼性にすぐれたスピーカを
提供することができるものである。 As described above, according to the present invention, it is possible to remove unnecessary parts of the core material, and to provide an adhesive margin for adhesion to the surface material. This makes it possible to provide a speaker with high performance and excellent reliability.
尚、心材のパターンは実施例の他、三角形、円
形、ひし形、六角形、長円形等が考えられ、その
配列方法も同心円状、放射状等色々考えられ、い
ずれの場合も同様な効果が得られるものである。
又、振動板の大きさも実施例の他、さらに大きな
スコーカー、ウーハー用としても適用可能であ
る。 In addition, the pattern of the heartwood may be triangular, circular, rhombic, hexagonal, oval, etc., in addition to the examples, and various ways of arranging it may be considered, such as concentric, radial, etc., and the same effect can be obtained in any case. It is something.
Furthermore, the size of the diaphragm can be applied to larger squawkers and woofers other than those of the embodiments.
第1図は従来のスピーカ用振動板の製造方法を
説明するための工程図、第2図は本発明のスピー
カ用振動板の製造方法の一実施例を説明するため
の工程図、第3図は同法に使用する成形金型の平
面図である。
11……熱可塑性樹脂フイルム、12……成形
金型、13……吸引穴、14……第1金型、15
……貫通孔、16……第2金型、17……2段凹
部、19……心材、20,21……表面材。
FIG. 1 is a process diagram for explaining a conventional method for manufacturing a diaphragm for a speaker, FIG. 2 is a process diagram for explaining an embodiment of the method for manufacturing a diaphragm for a speaker according to the present invention, and FIG. is a plan view of a molding die used in the same method. 11... Thermoplastic resin film, 12... Molding mold, 13... Suction hole, 14... First mold, 15
... Through hole, 16 ... Second mold, 17 ... Two-stage recess, 19 ... Core material, 20, 21 ... Surface material.
Claims (1)
に吸引穴を有する第1金型およびこの第1金型と
同パターンで上記第1金型の凹部パターンよりも
幅の広い貫通孔を設けた第2金型とを重ね、全体
として2段の凹部を有する成形金型を備え、この
成形金型により熱可塑性樹脂フイルムを真空、圧
空あるいは真空圧空成形して多数の凹凸を有する
心材を成形し、その後、上記第2金型を成形した
フイルム心材とともに取り出し上記第2金型から
突出した上記フイルム心材の凸部を切断除去し表
面材と平行になる部分を一部残した心材となし、
しかる後、この心材の両面に表面材を貼りあわせ
ることを特徴とするスピーカ用振動板の製造方
法。1. A first mold having an uneven pattern and suction holes at the bottom of the recess, and a second mold having the same pattern as the first mold but with through holes wider than the recess pattern of the first mold. A molding die is provided which overlaps the mold and has two recesses as a whole, and a thermoplastic resin film is vacuum-, pressure- or vacuum-pressure-formed using this molding die to form a core material having a large number of unevenness, and then, Taking out the second mold along with the molded film core material, cutting and removing the convex portion of the film core protruding from the second mold, leaving a portion parallel to the surface material as a core material;
A method for manufacturing a speaker diaphragm, which comprises: thereafter bonding surface materials to both sides of the core material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3773182A JPS58154998A (en) | 1982-03-09 | 1982-03-09 | Manufacture of diaphragm for speaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3773182A JPS58154998A (en) | 1982-03-09 | 1982-03-09 | Manufacture of diaphragm for speaker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58154998A JPS58154998A (en) | 1983-09-14 |
JPH0312517B2 true JPH0312517B2 (en) | 1991-02-20 |
Family
ID=12505631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3773182A Granted JPS58154998A (en) | 1982-03-09 | 1982-03-09 | Manufacture of diaphragm for speaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58154998A (en) |
-
1982
- 1982-03-09 JP JP3773182A patent/JPS58154998A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS58154998A (en) | 1983-09-14 |
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