JPH0642328A - Silencer - Google Patents

Silencer

Info

Publication number
JPH0642328A
JPH0642328A JP21556492A JP21556492A JPH0642328A JP H0642328 A JPH0642328 A JP H0642328A JP 21556492 A JP21556492 A JP 21556492A JP 21556492 A JP21556492 A JP 21556492A JP H0642328 A JPH0642328 A JP H0642328A
Authority
JP
Japan
Prior art keywords
metal
fiber
porous sheet
core material
silencer
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.)
Pending
Application number
JP21556492A
Other languages
Japanese (ja)
Inventor
Yasumasa Ouchi
康正 大内
Shoji Doi
祥司 土肥
Hiroyuki Okazaki
博行 岡崎
Shigeo Nishida
成夫 西田
佳久 ▲鶴▼森
Yoshihisa Tsurumori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Seisen Co Ltd
Osaka Gas Co Ltd
Original Assignee
Nippon Seisen Co Ltd
Osaka Gas Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Seisen Co Ltd, Osaka Gas Co Ltd filed Critical Nippon Seisen Co Ltd
Priority to JP21556492A priority Critical patent/JPH0642328A/en
Publication of JPH0642328A publication Critical patent/JPH0642328A/en
Pending legal-status Critical Current

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  • Exhaust Silencers (AREA)

Abstract

PURPOSE:To manufacture a silencer inexpensively though it is prevented from deteriorating both acoustic absorbing performance by glass wool and durability. CONSTITUTION:A metal-made supporting material 11 having ventilating openings 3...is provided in a casing 2 formed with an exhaust passage by connecting exhaust pipes 1, 1, and a porous sheet 5, formed of metal fiber having a 50mum or less mean diameter of averaging maximum and minimum diameters further with a substantially smooth peripheral surface by coating a core material formed of carbon fiber nonwoven fabric with nickel plating, is provided in the peripheral surface of this supporting material 4, to prevent glass wool from scattering to flow out by the porous sheet 5, by filling a space between the peripheral surface of this porous sheet 5 and the internal peripheral surface of the casing 2 with the glass wool.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、自動車やオートバイな
どに使用するために、排気通路を形成するケーシング内
に、通気用開口を有する金属製支持材を介して繊維製吸
音材を充填した消音器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound deadening material for use in automobiles, motorcycles, etc., in which a casing for forming an exhaust passage is filled with a fiber sound absorbing material through a metal supporting material having a ventilation opening. Regarding vessels.

【0002】[0002]

【従来の技術】上述のような消音器では、ケーシング内
にパンチングメタルなどの筒状の金属製支持材を設けて
排気通路を形成し、そのケーシング内周面と金属製支持
材との間にEガラス繊維やロックウールなどの吸音材を
充填しているが、排気ガスの流動や振動に起因して吸音
材が通気用開口から飛散流出し、吸音効果が早期に低く
なって耐久性が低下する問題があった。
2. Description of the Related Art In a silencer as described above, a cylindrical metal support member such as punching metal is provided in a casing to form an exhaust passage, and the exhaust passage is formed between the casing inner peripheral surface and the metal support member. E It is filled with sound absorbing material such as glass fiber and rock wool, but due to the flow and vibration of exhaust gas, the sound absorbing material scatters and flows out from the ventilation openings, reducing the sound absorbing effect early and lowering the durability. There was a problem to do.

【0003】そこで、従来、特開平3−294612号
公報に開示されているように、可撓焼結シートを金属製
支持材に巻き付け、通気用開口から繊維製吸音材が飛散
流出することを防止できるように構成したものがあっ
た。
Therefore, conventionally, as disclosed in Japanese Patent Laid-Open No. 3-294612, a flexible sintered sheet is wound around a metal support material to prevent the sound absorbing material made of fibers from scattering and flowing out from the ventilation opening. There was one configured to be able to.

【0004】そして、上記可撓焼結シートは、鉄系、銅
系、ニッケル系、ステンレス鋼などの金属を切削して得
た金属ビビリ切削短繊維(繊維の太さ20〜 100μm、長
さ2〜30mm)を焼結し、それを不織布に加工することに
より得、空隙率が高くて繊維製吸音材による吸音性能を
低下させることが無いように構成していた。
The flexible sintered sheet is made of metal, such as iron-based, copper-based, nickel-based, and stainless steel, which is obtained by cutting metal chattering short fibers (fiber thickness 20 to 100 μm, length 2). It was obtained by sintering (~ ~ 30 mm) and processing it into a non-woven fabric, and it was constructed so that the sound absorbing performance of the fiber sound absorbing material would not be deteriorated due to its high porosity.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、上述公
報に開示された従来例では、焼結シート製造のための多
くの工程や設備を必要とするとともに、短繊維製造にも
切削効率の低さから多大の時間を要し、結果的に消音器
のコストアップの一因となるものであった。
However, the conventional example disclosed in the above-mentioned publication requires many steps and facilities for producing a sintered sheet and also has a low cutting efficiency for producing short fibers. It takes a lot of time and, as a result, contributes to an increase in the cost of the silencer.

【0006】本発明は、このような事情に鑑みてなされ
たものであって、請求項1に係る発明の消音器は、繊維
製吸音材による吸音性能および耐久性のいずれをも低下
させることが無いものでありながら安価に製作できるも
のを提供することを目的とし、また、請求項2に係る発
明の消音器は、耐熱性を向上できるようにすることを目
的とし、そして、請求項3に係る発明の消音器は、空隙
率を大にして繊維製吸音材による吸音性能を向上できる
ようにすることを目的とする。
The present invention has been made in view of such circumstances, and the muffler of the invention according to claim 1 can reduce both the sound absorbing performance and the durability of the fiber sound absorbing material. It is an object of the present invention to provide a material that can be manufactured at a low cost even though it is not provided, and the silencer of the invention according to claim 2 is intended to improve heat resistance. An object of the silencer of the invention is to increase the porosity to improve the sound absorbing performance of the fiber sound absorbing material.

【0007】[0007]

【課題を解決するための手段】請求項1に係る発明は、
上述のような目的を達成するために、排気通路を形成す
るケーシング内に、通気用開口を有する金属製支持材を
介して繊維製吸音材を充填した消音器において、金属製
支持材と繊維製吸音材との間に、炭素繊維不織布から成
る芯材に金属材をメッキ被覆して最大直径と最小直径と
の平均である平均径が50μm以下でかつ実質的に平滑な
外周面を持つ金属繊維で構成された多孔性シートを介在
して構成する。
The invention according to claim 1 is
In order to achieve the above-mentioned object, in a silencer in which a sound absorbing material made of fiber is filled through a metal supporting material having a ventilation opening in a casing forming an exhaust passage, a metal supporting material and a fiber supporting material are used. A metal fiber having a substantially smooth outer peripheral surface with an average diameter of 50 μm or less, which is an average of a maximum diameter and a minimum diameter, obtained by plating a core material made of a carbon fiber nonwoven fabric with a sound absorbing material by plating. The porous sheet composed of is interposed.

【0008】通気用開口を有する金属製支持材として
は、パンチングメタルや金網などが使用できる。繊維製
吸音材としては、Eガラス繊維やロックウールなどが使
用できる。炭素繊維不織布から成る芯材としては、炭素
繊維単独の不織布、または、これと熱融着性繊維(熱可
塑性融着性繊維および熱硬化性融着性繊維の両者を含
む)とを混綿した不織布でも良い。炭素繊維としては、
レーヨン系、ポリアクリロニトリル(PAN)系、セル
ロース系、フェノール樹脂系、石炭ピッチ系、石油ピッ
チ系など各種のものが使用できる。また、これらを原料
として不融化・耐炎化したものや高温で処理して黒鉛化
したものなどが使用できる。熱融着性繊維材料として
は、ポリプロピレン、ポリエステル、ポリアクリロニト
リルなどの溶融温度の高いものが使用できる。金属材と
しては、ニッケルやクロムや銅、あるいは、それらの合
金など、耐熱性に優れた各種の材料が使用できる。ま
た、金属繊維は、その最大直径と最小直径との平均値を
50μm以下としている。50μmを超えるものでは、空隙
率が低下して吸音性を損なうからである。また、極端に
細径化したものでは製造が困難で高価となり、また、強
度的にも問題があり、より好ましくは5〜40μmであ
る。
A punching metal, a wire mesh, or the like can be used as the metal support member having the ventilation opening. As the fiber sound absorbing material, E glass fiber, rock wool or the like can be used. The core material made of carbon fiber non-woven fabric is a non-woven fabric of carbon fiber alone or a non-woven fabric in which this is mixed with thermofusible fibers (including both thermoplastic fusible fibers and thermosetting fusible fibers). But good. As carbon fiber,
Various types such as rayon type, polyacrylonitrile (PAN) type, cellulose type, phenol resin type, coal pitch type and petroleum pitch type can be used. In addition, it is possible to use, as a raw material, infusibilized / flame-proofed material, or treated at high temperature to be graphitized. As the heat-fusible fiber material, materials having a high melting temperature such as polypropylene, polyester and polyacrylonitrile can be used. As the metal material, various materials having excellent heat resistance such as nickel, chromium, copper, or alloys thereof can be used. Also, for metal fibers, the average value of the maximum diameter and the minimum diameter is
It is set to 50 μm or less. This is because if it exceeds 50 μm, the porosity is lowered and the sound absorbing property is impaired. Further, if the diameter is extremely thin, it is difficult to manufacture, it is expensive, and there is a problem in strength, and it is more preferably 5 to 40 μm.

【0009】また、請求項2に係る発明の消音器は、上
述のような目的を達成するために、請求項1に記載の金
属繊維を、金属メッキ層の内部に炭素繊維不織布から成
る芯材を有する複合繊維で構成する。
Further, in order to achieve the above-mentioned object, a silencer according to a second aspect of the present invention comprises a core material comprising the metal fiber according to the first aspect and a carbon fiber non-woven fabric inside a metal plating layer. And a composite fiber having

【0010】また、請求項3に係る発明の消音器は、上
述のような目的を達成するために、請求項1に記載の金
属繊維を、金属メッキ層の内部に炭素繊維不織布から成
る芯材が脱炭素処理されることにより形成された空洞を
繊維方向に沿って延在したもので構成する。
Further, in order to achieve the above-mentioned object, a silencer according to a third aspect of the present invention comprises the core material comprising the metal fiber according to the first aspect and a carbon fiber non-woven fabric inside the metal plating layer. Is formed by decarbonizing the cavities extending along the fiber direction.

【0011】[0011]

【作用】請求項1に係る発明の消音器の構成によれば、
炭素繊維不織布を芯材としてそれに金属材をメッキで被
覆した所定の径および性状を有する金属繊維で構成され
た多孔性シートにより、繊維製吸音材が金属製支持材の
通気用開口を通じて流出することを防止できる。また、
金属繊維どうしは、金属メッキ層によって結合している
ため、大きな結合面積が得られることから、機械的強度
の向上が可能となる。しかも、結合部は、平滑な凹状面
となるものでは、一般的繊維焼結品で見られていたよう
な切欠部が無く、このため、振動などに伴う亀裂や割れ
発生が防止でき、寿命向上も可能である。
According to the structure of the silencer of the invention according to claim 1,
A carbon fiber non-woven fabric is used as a core material, and a metal sheet is coated on the metal material by plating. A porous sheet made of metal fibers having a predetermined diameter and properties allows the sound absorbing material made of fiber to flow out through the ventilation opening of the metal supporting material. Can be prevented. Also,
Since the metal fibers are bonded by the metal plating layer, a large bonding area can be obtained, so that the mechanical strength can be improved. Moreover, if the joint has a smooth concave surface, it does not have the cutouts that were found in general fiber sintered products, so cracks and cracks due to vibration can be prevented and the service life is improved. Is also possible.

【0012】請求項2に係る発明の消音器の構成によれ
ば、金属メッキ層の内部の炭素繊維不織布から成る芯材
によって強度・耐熱性を高くできる。
According to the structure of the muffler of the second aspect of the invention, the strength and heat resistance can be increased by the core material made of carbon fiber nonwoven fabric inside the metal plating layer.

【0013】請求項3に係る発明の消音器の構成によれ
ば、金属メッキ層の内部の空洞により空隙率を高くでき
る。
According to the structure of the muffler of the third aspect of the present invention, the void ratio can be increased by the cavity inside the metal plating layer.

【0014】[0014]

【実施例】次に、本発明の実施例を図面に基づいて詳細
に説明する。
Embodiments of the present invention will now be described in detail with reference to the drawings.

【0015】(第1実施例)図1は、本発明に係る消音
器の第1実施例を示す一部切欠斜視図、図2は縦断面
図、および、図3は横断面図(図2のA−A線断面図)
であり、両側に排気管1,1を接続して排気通路を形成
したケーシング2内に、通気用開口3…を有するパンチ
ングメタルを筒状に曲げて形成した金属製支持材4が取
り付けられるとともに、その金属製支持材4に金属繊維
の多孔性シート5が巻き付けられている。
(First Embodiment) FIG. 1 is a partially cutaway perspective view showing a first embodiment of a silencer according to the present invention, FIG. 2 is a longitudinal sectional view, and FIG. 3 is a transverse sectional view (FIG. 2). A-A line sectional view)
In addition, a metal supporting member 4 formed by bending a punching metal having a ventilation opening 3 into a tubular shape is attached in a casing 2 in which exhaust pipes 1 and 1 are connected to both sides to form an exhaust passage. A metal fiber porous sheet 5 is wound around the metal supporting member 4.

【0016】多孔性シート5の外周面に保形用の金網6
が巻かれるとともに、金網6の外周面とケーシング2の
内周面との空間内に繊維製吸音材としてのグラスウール
7が充填されている。
On the outer peripheral surface of the porous sheet 5, a wire mesh 6 for shape retention is formed.
While being wound, the space between the outer peripheral surface of the wire mesh 6 and the inner peripheral surface of the casing 2 is filled with glass wool 7 as a fiber sound absorbing material.

【0017】上記消音器において、金属製支持材4とし
ては、金網を用いても良い。また、多孔性シート5の外
周面の保形用金網6は設けないものでも良い。
In the above silencer, a metal net may be used as the metal support member 4. Further, the shape-preserving wire mesh 6 on the outer peripheral surface of the porous sheet 5 may be omitted.

【0018】多孔性シート5としては、次のようにして
製造したものを用いた。繊維径13μm、長さ6mmのピッ
チ系炭素繊維を予めエポキシ樹脂により結合した不織布
[商品名ドナカーボS(ペーパー):ドナック株式会社
製、目付 50g/m2、厚さ2mm、幅 230mmの長尺製品]を
用意し、前処理として、その不織布を塩化パラジウム、
塩化スズ、塩酸を含む水溶液に30秒〜2分間程度浸漬し
て炭素繊維の導電性を高めた後、その表面にニッケルメ
ッキを行った。ニッケルメッキは、硫酸ニッケル330g/
l、塩酸ニッケル 45g/l、ほう酸 38g/lを含むワッ
ト浴で連続的に行い、その条件は電流 690A、巻き取り
速度 0.1m/min であった。
As the porous sheet 5, the one manufactured as follows was used. A non-woven fabric in which pitch-based carbon fibers having a fiber diameter of 13 μm and a length of 6 mm are bonded in advance with an epoxy resin [Product name Dona Carbo S (Paper): manufactured by Donac Co., Ltd., long product with a basis weight of 50 g / m 2 , thickness of 2 mm and width of 230 mm. ], And prepare the non-woven fabric as palladium chloride,
After immersing in an aqueous solution containing tin chloride and hydrochloric acid for about 30 seconds to 2 minutes to increase the conductivity of the carbon fiber, the surface of the carbon fiber was plated with nickel. Nickel plating is nickel sulfate 330g /
l, nickel chloride 45 g / l, and boric acid 38 g / l were continuously used in a watt bath, and the conditions were a current of 690 A and a winding speed of 0.1 m / min.

【0019】このようにして得られた金属被覆芯材不織
布は、厚さ2mm、目付550g/m2、空隙率95.7%の特性を
有し、かつ、メッキ層の厚さは 4.5μmであった。更
に、上記金属被覆芯材不織布に対して、 900℃×20分で
の焼鈍処理を分解アンモニアガス(H2 :75Vol %、N
2 :25Vol %)中で行い、ニッケルメッキ層内部に芯材
としての炭素繊維を残して柔軟性を高めた複合繊維を
得、これを多孔性シート5として用いた。この複合繊維
においては、最大直径と最小直径との平均である平均径
が22μmでかつ実質的に平滑な外周面を有している。
The metal-coated core material non-woven fabric thus obtained had the characteristics of a thickness of 2 mm, a basis weight of 550 g / m 2 , and a porosity of 95.7%, and the thickness of the plating layer was 4.5 μm. . Further, the metal-coated core non-woven fabric was annealed at 900 ° C. for 20 minutes to decompose ammonia gas (H 2 : 75 Vol%, N
2 : 25% by volume) to obtain a composite fiber having enhanced flexibility by leaving carbon fiber as a core material inside the nickel plating layer, which was used as the porous sheet 5. In this composite fiber, the average diameter, which is the average of the maximum diameter and the minimum diameter, is 22 μm and has a substantially smooth outer peripheral surface.

【0020】図5の一部切欠斜視図に示すように、複合
繊維8は、炭素繊維芯材9の表面上にほぼ均一な厚さの
金属メッキ層10を形成して構成され、その炭素繊維ど
うしの結合部の表面にも金属メッキ層10が形成され、
この金属メッキ層10により、結合部に沿って平滑に彎
曲した凹状かつアーチ状の外周面を備えるものに形成さ
れている。
As shown in the partially cut-away perspective view of FIG. 5, the composite fiber 8 is formed by forming a metal plating layer 10 having a substantially uniform thickness on the surface of a carbon fiber core material 9. The metal plating layer 10 is also formed on the surface of the joint portion between the
The metal plating layer 10 is formed to have a concave and arch-shaped outer peripheral surface that is smoothly curved along the joint.

【0021】次に、上記複合繊維の製造方法につき、図
4の工程図を用いて説明する。炭素繊維をランダムに絡
み合わせた長尺のフェルト状の芯材不織布11をアンコ
イラ12から順次供給し、前処理槽13で導電性を高め
るための触媒を付与する。そして、水洗槽14を通ると
ともに、電気メッキ槽15のニッケルアノード極22
と、その上流側の第1の給電ロール16および下流側の
第2の給電ロール17との間に電圧を付加することによ
って芯材不織布11の表面にニッケルメッキを施す。そ
の後、水洗槽18および乾燥装置19を通し、リコイラ
20で巻き取ることによって金属被覆芯材不織布21を
得る。そして、この金属被覆芯材不織布21を焼鈍処理
して、例えば、図6の一部切欠斜視図に示すような、金
属繊維5a…が互いに結合した多孔性シート5を得るの
である。
Next, a method of manufacturing the above-mentioned composite fiber will be described with reference to the process chart of FIG. A long felt-like core material nonwoven fabric 11 in which carbon fibers are randomly intertwined is sequentially supplied from an uncoiler 12, and a catalyst for increasing conductivity is applied in a pretreatment tank 13. Then, the nickel anode electrode 22 of the electroplating tank 15 is passed while passing through the washing tank 14.
Then, a voltage is applied between the first power feeding roll 16 on the upstream side and the second power feeding roll 17 on the downstream side to nickel-plat the surface of the core material nonwoven fabric 11. After that, the metal-coated core material nonwoven fabric 21 is obtained by passing through the washing tank 18 and the drying device 19 and winding by the ricoiler 20. Then, the metal-coated core material nonwoven fabric 21 is annealed to obtain the porous sheet 5 in which the metal fibers 5a ... Are bonded to each other, as shown in the partially cutaway perspective view of FIG. 6, for example.

【0022】(第2実施例)第1実施例で得られた焼鈍
処理前の金属被覆芯材不織布に、空気中で 800℃×30分
程度加熱することによって、内部の炭素繊維と結合材と
を除去し、ニッケルメッキ層の内部に炭素繊維不織布か
ら成る芯材の脱炭素処理により形成した繊維方向に延び
る空洞を備えた金属繊維を得た。
(Second Embodiment) The uncoated metal-coated core material nonwoven fabric obtained in the first embodiment is heated in air at 800 ° C. for about 30 minutes to form carbon fibers and a binder inside. Was removed, and a metal fiber having a cavity extending in the fiber direction formed by decarbonizing the core material made of the carbon fiber nonwoven fabric inside the nickel plating layer was obtained.

【0023】上記加熱処理において、加熱温度が高いほ
ど、また、長時間処理したものほど脱炭素処理は完全で
あり、前記条件では、0.027 重量%まで炭素が減少し、
実質的にはほとんど無視できる程度のものとなった。
In the above heat treatment, the higher the heating temperature and the longer the treatment, the more complete the decarbonization treatment. Under the above conditions, the carbon content was reduced to 0.027% by weight.
It was virtually negligible.

【0024】次いで、繊維表面を光輝化するために、前
述した分解アンモニアガス雰囲気中で1150℃×20分間の
熱処理を行い、これを多孔性シート5として用いた。こ
の多孔性シート5における空隙率は、97.2%と非常に高
いものであった。
Next, in order to brighten the fiber surface, heat treatment was carried out at 1150 ° C. for 20 minutes in the above-mentioned decomposed ammonia gas atmosphere, and this was used as the porous sheet 5. The porosity of this porous sheet 5 was a very high value of 97.2%.

【0025】(第3実施例)繊維径が13μmで長さが15
mmのピッチ系炭素繊維を第1実施例と同様のエポキシ樹
脂により結合したフェルト状の不織布[商品名ドナカー
ボS(ペーパー):ドナック株式会社製、目付 50g/
m2、厚さ2mm、幅 230mmの長尺製品]に厚さ 4.5μmの
ニッケルをメッキ被覆して、目付550g/m2の複合繊維で
なる金属被覆芯材不織布を形成した。被覆方法は、2.20
A/m2の電流密度で16分間処理したものである。
(Third Embodiment) Fiber diameter is 13 μm and length is 15
Felt-like non-woven fabric obtained by bonding pitch-based carbon fibers of mm with the same epoxy resin as in the first embodiment [trade name Dona Carbo S (Paper): Donac Co., Ltd., basis weight 50 g /
m 2, a thickness of 2 mm, and plated-coating thickness 4.5μm of nickel long products on the width 230 mm, to form a metal coating core nonwoven fabric comprising composite fibers having a basis weight of 550 g / m 2. The coating method is 2.20
It was treated for 16 minutes at a current density of A / m 2 .

【0026】その後、水洗を経た上記金属被覆芯材不織
布に対して、前述第1実施例と同様に、 900℃×20分で
の焼結熱処理を分解アンモニアガス中で行うとともに、
若干の加圧を加えることによって、ニッケルメッキ層内
部に芯材としての炭素繊維を残して柔軟性を高めた複合
繊維を得、これを多孔性シート5として用いた。この多
孔性シート5における空隙率は92%であった。
Thereafter, the metal-coated core nonwoven fabric that has been washed with water is subjected to a sintering heat treatment at 900 ° C. for 20 minutes in decomposed ammonia gas in the same manner as in the first embodiment.
By slightly applying a pressure, a carbon fiber as a core material was left inside the nickel plating layer to obtain a composite fiber having improved flexibility, which was used as the porous sheet 5. The porosity of this porous sheet 5 was 92%.

【0027】(第4実施例)第3実施例で得られた複合
繊維から成る金属被覆不織布を、更に1150℃の前述した
分解アンモニアガス雰囲気の炉中に挿入し、30分の脱炭
素処理を行ってニッケルメッキ層の内部に炭素繊維不織
布から成る芯材の脱炭素処理により形成された空洞を繊
維方向に沿って延在した金属繊維を得、これを多孔性シ
ート5として用いた。炭素は0.008 重量%まで減少し
た。
(Fourth Embodiment) The metal-coated non-woven fabric made of the composite fiber obtained in the third embodiment is further inserted into the furnace of the above-mentioned decomposed ammonia gas atmosphere at 1150 ° C., and decarbonization treatment is carried out for 30 minutes. By doing so, a metal fiber was obtained in which a cavity formed by decarbonizing a core material made of a carbon fiber non-woven fabric was extended inside the nickel plating layer along the fiber direction, and this was used as the porous sheet 5. Carbon was reduced to 0.008% by weight.

【0028】(第5実施例)第1実施例の芯材不織布
(寸法: 200mm× 300mm)に銅メッキを行って銅繊維不
織布を得るため、以下のバッチ処理を行った。メッキ浴
には、ピロリン酸銅63〜105g/l、ピロリン酸カリウム
240〜470g/l、アンモニア水2〜6g /l、硝酸カリ
ウム2〜16g /lを含むメッキ液(pH 8.5)を用い、
100A、15分間の条件で行った。そして更に 500℃、10
分間の焼鈍を行うことによって、厚さ2mm、目付550g/
m2、空隙率95.7%、繊維径が22μmでメッキ厚さが 4.5
μmの銅メッキ層内部に芯材としての炭素繊維を残して
柔軟性を高めた複合繊維を得、これを多孔性シート5と
して用いた。
(Fifth Embodiment) In order to obtain a copper fiber nonwoven fabric by copper plating the core material nonwoven fabric (dimensions: 200 mm × 300 mm) of the first embodiment, the following batch treatment was carried out. For the plating bath, copper pyrophosphate 63-105g / l, potassium pyrophosphate
Using a plating solution (pH 8.5) containing 240-470 g / l, ammonia water 2-6 g / l, potassium nitrate 2-16 g / l,
It was performed under the conditions of 100 A and 15 minutes. And further 500 ℃, 10
By annealing for 2 minutes, the thickness is 2 mm and the basis weight is 550 g /
m 2 , porosity 95.7%, fiber diameter 22 μm, plating thickness 4.5
A carbon fiber as a core material was left inside the copper plating layer having a thickness of μm to obtain a composite fiber having improved flexibility, which was used as a porous sheet 5.

【0029】(第6実施例)長さ80mm、径13μmの黒鉛
化炭素繊維(商標「ドナカーボS」:ドナック株式会社
製)90重量部と長さ51mm、径17μmのポリプロピレン繊
維(チッソ株式会社製)10重量部とを混綿し、エアーレ
イ法によるランダムウェブカードでメッシュ上に空気で
混綿物を吹き付け、下方から吸引して、目付 40g/m2
混面シートを作成した後、 150℃で加熱して芯材不織布
(寸法:80mm× 130mm)を得、この芯材不織布を、ホウ
酸40g /l、塩化ニッケル45g /lおよび硫酸ニッケル
330g/lを含むメッキ液を用い、前処理なしに20A、30
秒間の通電を行い、更に脱炭素処理し、メッキ厚さが2
μmで空隙率90%のニッケルメッキ層内部に炭素繊維不
織布から成る芯材の脱炭素処理により形成した繊維方向
に延びる空洞を備えた金属繊維を得、これを多孔性シー
ト5として用いた。
(Sixth Embodiment) 90 parts by weight of graphitized carbon fiber having a length of 80 mm and a diameter of 13 μm (trademark “DONA CARBO S”: manufactured by Donac Co.) and polypropylene fiber having a length of 51 mm and a diameter of 17 μm (manufactured by Chisso Corporation) ) 10 parts by weight are mixed, and the mixed material is blown by air onto the mesh with a random web card by the air ray method, sucked from below, and a mixed surface sheet with a basis weight of 40 g / m 2 is created, then heated at 150 ° C. To obtain a core material non-woven fabric (dimensions: 80 mm x 130 mm), and this core material non-woven fabric is combined with boric acid 40 g / l, nickel chloride 45 g / l and nickel sulfate.
Using plating solution containing 330g / l, 20A, 30 without pretreatment
Energize for 2 seconds, further decarbonize, plating thickness is 2
A metal fiber having a cavity extending in the fiber direction formed by decarbonizing a core material made of a carbon fiber non-woven fabric inside a nickel plating layer having a porosity of 90% in μm was used as the porous sheet 5.

【0030】(第7実施例)黒鉛化炭素繊維70重量部と
ポリプロピレン繊維30重量部とを使用する以外は第6実
施例と同様にして処理し、空隙率93%のニッケルメッキ
層内部に炭素繊維不織布から成る芯材の脱炭素処理によ
り形成した繊維方向に延びる空洞を備えた金属繊維を
得、これを多孔性シート5として用いた。
(Seventh Embodiment) The same procedure as in the sixth embodiment is carried out except that 70 parts by weight of graphitized carbon fiber and 30 parts by weight of polypropylene fiber are used, and carbon is put inside the nickel plating layer having a porosity of 93%. A metal fiber having cavities extending in the fiber direction formed by decarbonizing a core material made of a fibrous nonwoven fabric was obtained and used as the porous sheet 5.

【0031】(第8実施例)黒鉛化炭素繊維50重量部と
ポリプロピレン繊維50重量部とを使用する以外は第6実
施例と同様にして処理し、空隙率96%のニッケルメッキ
層内部に炭素繊維不織布から成る芯材の脱炭素処理によ
り形成した繊維方向に延びる空洞を備えた金属繊維を
得、これを多孔性シート5として用いた。
(Eighth Embodiment) The same procedure as in the sixth embodiment was carried out except that 50 parts by weight of graphitized carbon fiber and 50 parts by weight of polypropylene fiber were used. A metal fiber having cavities extending in the fiber direction formed by decarbonizing a core material made of a fibrous nonwoven fabric was obtained and used as the porous sheet 5.

【0032】(第9実施例)黒鉛化炭素繊維30重量部と
ポリプロピレン繊維70重量部とを使用する以外は第6実
施例と同様にして処理し、空隙率99%のニッケルメッキ
層内部に炭素繊維不織布から成る芯材の脱炭素処理によ
り形成した繊維方向に延びる空洞を備えた金属繊維を
得、これを多孔性シート5として用いた。
(Ninth Example) The same treatment as in the sixth example was carried out except that 30 parts by weight of graphitized carbon fiber and 70 parts by weight of polypropylene fiber were used, and carbon was put inside the nickel plating layer having a porosity of 99%. A metal fiber having cavities extending in the fiber direction formed by decarbonizing a core material made of a fibrous nonwoven fabric was obtained and used as the porous sheet 5.

【0033】(第10実施例)第6実施例の手法に準じ
て、メッキ厚さが2μmで空隙率90%のニッケルメッキ
層内部に炭素繊維不織布から成る芯材の脱炭素処理によ
り形成した繊維方向に延びる空洞を備えた金属繊維を
得、これを多孔性シート5として用いた。
(Tenth embodiment) A fiber formed by decarbonizing a core material made of a carbon fiber nonwoven fabric inside a nickel plating layer having a plating thickness of 2 μm and a porosity of 90% according to the method of the sixth embodiment. A metal fiber having a cavity extending in the direction was obtained, and this was used as the porous sheet 5.

【0034】[0034]

【発明の効果】以上の説明から明らかなように、請求項
1に係る発明の消音器によれば、炭素繊維を芯材として
それに金属材をメッキした金属繊維で形成した多孔性シ
ートを用いるから、切削や焼結をせずに済み、大掛かり
な設備が不用になるとともに製造に要する手間を少なく
できて材料が安価になり、繊維製吸音材による吸音性能
および耐久性のいずれをも低下させることが無く、また
繊維製吸音材の飛散をも防止できる安価な消音器を提供
できるようになった。
As is apparent from the above description, according to the muffler of the invention according to claim 1, the porous sheet formed of the metal fiber plated with the metal material is used as the core material of the carbon fiber. Since it does not need to be cut or sintered, large-scale equipment is not required, the labor required for manufacturing can be reduced, the material becomes cheaper, and the sound absorbing performance and durability of the fiber sound absorbing material are reduced. It is now possible to provide an inexpensive muffler that does not have any problems and that can prevent scattering of the sound absorbing material made of fiber.

【0035】請求項2に係る発明の消音器によれば、金
属メッキ層の内部の炭素繊維不織布から成る芯材によっ
て耐熱性を高くできるから、高温の排気ガスに対しても
良好に使用でき、汎用性を向上できるようになった。
According to the muffler of the second aspect of the invention, since the heat resistance can be increased by the core material made of carbon fiber nonwoven fabric inside the metal plating layer, it can be used favorably even at high temperature exhaust gas, The versatility can be improved.

【0036】請求項3に係る発明の消音器によれば、金
属メッキ層の内部の空洞により空隙率を高くできるか
ら、繊維製吸音材による吸音性能をより向上できるよう
になった。
According to the muffler of the third aspect of the present invention, since the void ratio can be increased by the cavity inside the metal plating layer, the sound absorbing performance of the fiber sound absorbing material can be further improved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る消音器の実施例を示す一部切欠斜
視図である。
FIG. 1 is a partially cutaway perspective view showing an embodiment of a silencer according to the present invention.

【図2】全体縦断面図である。FIG. 2 is an overall vertical sectional view.

【図3】図2のA−A線断面図である。3 is a cross-sectional view taken along the line AA of FIG.

【図4】金属繊維の多孔性シートの製造方法を示す工程
図である。
FIG. 4 is a process drawing showing the method for producing a porous sheet of metal fibers.

【図5】多孔性シートの要部を示す一部切欠斜視図であ
る。
FIG. 5 is a partially cutaway perspective view showing a main part of a porous sheet.

【図6】多孔性シートの一部省略斜視図である。FIG. 6 is a partially omitted perspective view of a porous sheet.

【符号の説明】[Explanation of symbols]

2…ケーシング 3…通気用開口 4…金属製支持材 5…多孔性シート 7…繊維製吸音材としてのグラスウール 8…複合繊維 9…炭素繊維不織布から成る芯材 10…金属メッキ層 2 ... Casing 3 ... Ventilation opening 4 ... Metal support 5 ... Porous sheet 7 ... Fiberglass sound absorbing material glass wool 8 ... Composite fiber 9 ... Carbon fiber nonwoven fabric core 10 ... Metal plating layer

─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成4年8月26日[Submission date] August 26, 1992

【手続補正1】[Procedure Amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0029[Name of item to be corrected] 0029

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0029】(第6実施例)長さ80mm、径13μm
の黒鉛化炭素繊維(商標「ドナカーボS」:ドナック株
式会社製)90重量部と長さ51mm、径17μmのポ
リプロピレン繊維(チッソ株式会社製)10重量部とを
混綿し、エアーレイ法によるランダムウェブカードでメ
ッシュ上に空気で混綿物を吹き付け、下方から吸引し
て、目付40g/mの混綿シートを作成した後、15
0℃で加熱して芯材不織布(寸法:80mm×130m
m)を得、この芯材不織布を、ホウ酸40g/1、塩化
ニッケル45g/1および硫酸ニッケル330g/1を
含むメッキ液を用い、前処理なしに20A、30秒間の
通電を行い、更に脱炭素処理し、メッキ厚さが2μmで
空隙率90%のニッケルメッキ層内部に炭素繊維不織布
から成る芯材の脱炭素処理により形成した繊維方向に延
びる空洞を備えた金属繊維を得、これを多孔性シート5
として用いた。
(Sixth Embodiment) Length 80 mm, Diameter 13 μm
90 parts by weight of graphitized carbon fiber (trademark "DONA CARBO S": manufactured by Donac Co., Ltd.) and 10 parts by weight of polypropylene fiber having a length of 51 mm and a diameter of 17 μm (manufactured by Chisso Co., Ltd.) are mixed, and a random web card by the air ray method is used. in blowing cotton mixing was in air on the mesh, and sucked from below, after creating a mixed cotton sheet having a mass per unit area of 40 g / m 2, 15
Non-woven core material by heating at 0 ° C (dimensions: 80 mm x 130 m
m) was obtained, and this core nonwoven fabric was energized at 20 A for 30 seconds without pretreatment using a plating solution containing 40 g / 1 of boric acid, 45 g / 1 of nickel chloride and 330 g / 1 of nickel sulfate, and further removed. A metal fiber having a cavity extending in the fiber direction formed by decarbonizing a core material made of a carbon fiber nonwoven fabric inside a nickel plating layer having a plating thickness of 2 μm and a porosity of 90% was obtained by performing a carbon treatment, Sex sheet 5
Used as.

フロントページの続き (72)発明者 岡崎 博行 大阪市中央区平野町四丁目1番2号 大阪 瓦斯株式会社内 (72)発明者 西田 成夫 大阪府枚方市池之宮四丁目17番1号 日本 精線株式会社枚方工場内 (72)発明者 ▲鶴▼森 佳久 大阪府枚方市池之宮四丁目17番1号 日本 精線株式会社枚方工場内Front page continuation (72) Inventor Hiroyuki Okazaki 4-1-2, Hirano-cho, Chuo-ku, Osaka, Osaka Gas Co., Ltd. (72) Inventor Shigeo Nishida 4-1-1, Ikenomiya, Hirakata, Osaka Japan Seisei Line Inside the Hirakata factory (72) Inventor ▲ Crane ▼ Yoshihisa Mori 4-17-1, Ikenomiya, Hirakata-shi, Osaka Japan Seisen Co., Ltd. Inside the Hirakata factory

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 排気通路を形成するケーシング内に、通
気用開口を有する金属製支持材を介して繊維製吸音材を
充填した消音器において、 前記金属製支持材と前記繊維製吸音材との間に、炭素繊
維不織布から成る芯材に金属材をメッキ被覆して最大直
径と最小直径との平均である平均径が50μm以下でかつ
実質的に平滑な外周面を持つ金属繊維で構成された多孔
性シートを介在したことを特徴とする消音器。
1. A silencer in which a fiber sound absorbing material is filled in a casing forming an exhaust passage through a metal supporting material having a ventilation opening, wherein the metal supporting material and the fiber sound absorbing material are In the meantime, a core material made of a carbon fiber non-woven fabric was plated and coated with a metal material, and was composed of metal fibers having an average diameter of 50 μm or less, which is the average of the maximum diameter and the minimum diameter, and having a substantially smooth outer peripheral surface. A silencer characterized by interposing a porous sheet.
【請求項2】 請求項1に記載の金属繊維が、金属メッ
キ層の内部に炭素繊維不織布から成る芯材を有する複合
繊維である消音器。
2. A silencer in which the metal fiber according to claim 1 is a composite fiber having a core material made of a carbon fiber nonwoven fabric inside a metal plating layer.
【請求項3】 請求項1に記載の金属繊維が、金属メッ
キ層の内部に、炭素繊維不織布から成る芯材が脱炭素処
理されることにより形成された空洞を繊維方向に沿って
延在したものである消音器。
3. The metal fiber according to claim 1, wherein a cavity formed by decarbonizing a core material made of a carbon fiber non-woven fabric extends inside the metal plating layer along the fiber direction. A silencer that is one.
JP21556492A 1992-07-20 1992-07-20 Silencer Pending JPH0642328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21556492A JPH0642328A (en) 1992-07-20 1992-07-20 Silencer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21556492A JPH0642328A (en) 1992-07-20 1992-07-20 Silencer

Publications (1)

Publication Number Publication Date
JPH0642328A true JPH0642328A (en) 1994-02-15

Family

ID=16674522

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21556492A Pending JPH0642328A (en) 1992-07-20 1992-07-20 Silencer

Country Status (1)

Country Link
JP (1) JPH0642328A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005329592A (en) * 2004-05-19 2005-12-02 Makio Naito Sound absorbing heat barrier material, exhaust system heat barrier cover for car engine and manufacturing method of them
JP2007198679A (en) * 2006-01-27 2007-08-09 Kumagai Gumi Co Ltd Duct component and duct structure
US7364011B2 (en) * 2002-04-05 2008-04-29 Martin Hirschorn Attenuating power booster
JP2008151413A (en) * 2006-12-18 2008-07-03 Kumagai Gumi Co Ltd Duct component
EP2390125A2 (en) 2010-05-27 2011-11-30 Kobelco Construction Machinery Co., Ltd. Front window formed in cabin of construction machine
JP2013519037A (en) * 2010-02-02 2013-05-23 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Muffler with integrated catalytic converter and polymer muffler body
JP2019215085A (en) * 2013-12-09 2019-12-19 デイコ アイピー ホールディングス, エルエルシーDayco Ip Holdings, Llc Noise attenuation unit for engine systems
WO2023074199A1 (en) * 2021-10-26 2023-05-04 富士フイルム株式会社 Ventilation silencer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7364011B2 (en) * 2002-04-05 2008-04-29 Martin Hirschorn Attenuating power booster
JP2005329592A (en) * 2004-05-19 2005-12-02 Makio Naito Sound absorbing heat barrier material, exhaust system heat barrier cover for car engine and manufacturing method of them
JP4712315B2 (en) * 2004-05-19 2011-06-29 牧男 内藤 Sound-absorbing heat insulating material, exhaust heat insulating cover for automobile engine, and manufacturing method thereof
JP2007198679A (en) * 2006-01-27 2007-08-09 Kumagai Gumi Co Ltd Duct component and duct structure
JP2008151413A (en) * 2006-12-18 2008-07-03 Kumagai Gumi Co Ltd Duct component
JP2013519037A (en) * 2010-02-02 2013-05-23 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Muffler with integrated catalytic converter and polymer muffler body
EP2390125A2 (en) 2010-05-27 2011-11-30 Kobelco Construction Machinery Co., Ltd. Front window formed in cabin of construction machine
US8303027B2 (en) 2010-05-27 2012-11-06 Kobelco Construction Machinery Co., Ltd. Front window formed in cabin of construction machine
JP2019215085A (en) * 2013-12-09 2019-12-19 デイコ アイピー ホールディングス, エルエルシーDayco Ip Holdings, Llc Noise attenuation unit for engine systems
WO2023074199A1 (en) * 2021-10-26 2023-05-04 富士フイルム株式会社 Ventilation silencer

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