JPH08258191A - Sound insulation cover and manufacture thereof - Google Patents

Sound insulation cover and manufacture thereof

Info

Publication number
JPH08258191A
JPH08258191A JP7058912A JP5891295A JPH08258191A JP H08258191 A JPH08258191 A JP H08258191A JP 7058912 A JP7058912 A JP 7058912A JP 5891295 A JP5891295 A JP 5891295A JP H08258191 A JPH08258191 A JP H08258191A
Authority
JP
Japan
Prior art keywords
fiber
air
sound insulation
mold
soundproof cover
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
JP7058912A
Other languages
Japanese (ja)
Inventor
Makoto Nakamura
眞 中村
Masami Aoki
正巳 青木
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.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
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 Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP7058912A priority Critical patent/JPH08258191A/en
Publication of JPH08258191A publication Critical patent/JPH08258191A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve the workability during assembly and obtain a weight- reduced sound insulation cover with a good sealing property and less escaping of sound by integrally forming a fiber aggregate of an aggregate made by heat forming a great number of short fibers and a sound insulation sheet. CONSTITUTION: A mold being partially in conformity with the configuration of a compressor or accumulator for an air-conditioner is manufactured by the use of a punching metal to be an air permeable raw material. In the next place, an unheated aggregate 2 being mixed and dispersed with polyester short fiber and polyester compound fiber (about 95 deg.C in its outside melting point and about 235 deg.C in its core side melting point) with a double structure in its cross-section is blow filled together with air between a mold upper die 1 and mold lower die 3. Then, hot air at about 140 deg.C Is sent therein from an air blower port 4 underneath the molds, and further a cool air at room temperature is sent therein for formation as a result of obtaining a fiber aggregate. The fiber aggregate is formed in integral with a PVC sheet as a sound insulation sheet by the use of an adhesive through vacuum formation in order to obtain a sound insulation cover.

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、コンプレッサー、アキ
ュムレーター、モーターなどの防音カバー及びその製造
方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof cover for compressors, accumulators, motors, etc. and a method for manufacturing the same.

【0002】[0002]

【従来の技術】従来のコンプレッサーなどの防音用のカ
バーは、フェルトと遮音材のポリ塩化ビニル系のシート
とを貼り合わせたシート状積層体を、帯状にコンプレッ
サーなど、さらにはその付属物にまで巻き付け、更にそ
のシート状積層体を蓋として上からかぶせて音源を覆う
というものが一般的であった。
2. Description of the Related Art A conventional soundproof cover for a compressor or the like is a sheet-like laminated body in which a felt and a polyvinyl chloride-based sheet of a sound insulating material are attached to each other, and a belt-like compressor or even its accessories. In general, the sound source is wrapped and covered with the sheet-shaped laminated body as a lid from above.

【0003】[0003]

【発明が解決しようとする課題】上記の如き、従来の防
音カバーにおいては、立体的に成形されていないので、
音源を覆うためには部品の数も多くなってしまい、組み
立てにも手間がかかり過ぎる。又、カバーと蓋とが一体
になっていないのでその間に隙間ができるので、防音性
能を上げるためには、その隙間を埋めるためにもう一度
帯状のシート状積層体を上から巻き付けねばならないな
どという問題があった。
As described above, since the conventional soundproof cover is not molded three-dimensionally,
To cover the sound source, the number of parts increases, and it takes too much time to assemble. Further, since the cover and the lid are not integrated, there is a gap between them, so in order to improve the soundproofing performance, the band-shaped sheet-like laminated body has to be wound again from above to fill the gap. was there.

【0004】本発明は、このような従来の技術に鑑みて
なされたものであり、組立時の作業性が良く、シール性
の優れた音漏れの少ない軽量の防音カバーを提供するも
のである。
The present invention has been made in view of the above-mentioned conventional techniques, and provides a lightweight soundproof cover which has good workability during assembly, excellent sealing performance, and little sound leakage.

【0005】[0005]

【課題を解決するための手段】本発明では、多数の短繊
維を加熱成形して集合体とした繊維集合体と遮音シート
とを一体成形したことを特徴とする防音カバーを用いる
ことにより、上記のような問題点を解決を図った。本発
明の防音カバーは、コンプレッサーやアキュムレーター
などの形状の一部に合わせて任意の形状に一体成形でき
ることが特徴である。
According to the present invention, by using a soundproof cover characterized by integrally molding a sound-insulating sheet and a fiber assembly obtained by thermoforming a large number of short fibers. I tried to solve such problems. The soundproof cover of the present invention is characterized in that it can be integrally molded into an arbitrary shape according to a part of the shape of a compressor, an accumulator, or the like.

【0006】本発明に用いられる繊維集合体は、低融点
の短繊維の結合剤を少なくとも5重量%以上、好ましく
は10重量%以上含む素材から成ることが好ましい。本
発明に使用される繊維集合体としては、繊維径分布の中
心が50デニ−ル以下の細い短繊維を用いると共に、平
均見掛け密度を0.01〜0.50g/cm3 の範囲に
納めることで繊維集合体内部の通気抵抗を大きくして吸
音特性を良好にした。もし繊維径分布の中心が50デニ
−ルより大きい繊維を用いると、同一見掛け密度におい
て粗な状態になり、通気抵抗が小さくなり、吸音特性は
劣化してしまう。見掛け密度を高くして防音性を改善し
ようとすると、硬くなり過ぎてかえって防音性能は低下
する。更に、見掛け密度を高してくすることは、重量ア
ップにつながり、軽量化、コストダウンにとって好まし
くない。これらの観点から、本発明の目的達成のために
は、平均見掛け密度を0.01〜0.50g/cm3
範囲にすること、さらに、好ましくは、0.04〜0.
15g/cm3 の範囲である。この繊維集合体は平均見
掛け密度を0.005〜0.15g/cm3 のプレ繊維
集合体を更に2〜10倍に圧縮して成形したものでも良
い。
The fiber assembly used in the present invention is preferably made of a material containing at least 5% by weight, preferably 10% by weight or more, of a binder of low melting point short fibers. As the fiber assembly used in the present invention, fine short fibers having a fiber diameter distribution center of 50 denier or less should be used, and the average apparent density should be set in the range of 0.01 to 0.50 g / cm 3. The air-absorption resistance inside the fiber assembly was increased to improve the sound absorption characteristics. If fibers having a fiber diameter distribution center of more than 50 denier are used, a coarse state will be obtained at the same apparent density, the air flow resistance will be small, and the sound absorption characteristics will be deteriorated. When the apparent density is increased to improve the soundproofing property, the soundproofing performance is deteriorated because it becomes too hard. Further, increasing the apparent density leads to an increase in weight, which is not preferable for weight reduction and cost reduction. From these viewpoints, in order to achieve the object of the present invention, the average apparent density is set in the range of 0.01 to 0.50 g / cm 3 , and more preferably 0.04 to 0.
It is in the range of 15 g / cm 3 . This fiber assembly may be formed by further compressing a pre-fiber assembly having an average apparent density of 0.005 to 0.15 g / cm 3 by 2 to 10 times.

【0007】本発明による繊維集合体の素材として使用
する短繊維は、基本的には繊維系分布の中心が50デニ
−ル以下とし、高吸音性能を実現するためには、30デ
ニール以下、更には15デニ−ル以下の短繊維を用いる
ことが望ましい。前記素材としての短繊維の材料として
は例えばポリエステル、ポリプロピレン、ポリエチレ
ン、ポリスチレン、ナイロン、アクリル、ビニロン等の
合成繊維の他に、羊毛、綿、麻等の天然繊維を使用する
こともできる。更に、これらの繊維を使用した布から開
繊した短繊維を使用することもできる。
The short fibers used as the material of the fiber assembly according to the present invention basically have a fiber distribution center of 50 denier or less, and in order to realize high sound absorption performance, 30 denier or less, It is desirable to use short fibers of 15 denier or less. As the material of the short fiber as the material, for example, in addition to synthetic fibers such as polyester, polypropylene, polyethylene, polystyrene, nylon, acryl and vinylon, natural fibers such as wool, cotton and hemp can be used. Furthermore, it is also possible to use short fibers opened from a cloth using these fibers.

【0008】本発明の繊維集合体は、種々の成形法で得
ることができる。ひとつは、開繊してバラバラになった
短繊維を気体(空気)と共に通気孔を有するモ−ルド内
に吹き込み、多数の細孔よりこの空気のみを排出し、短
繊維のみをモ−ルド内に充填して成形する方法である。
このような空気搬送式の充填法により、所望の立体的な
形状に合致したモ−ルドに沿った形状の充填が可能とな
り、全体に均質な多孔質の繊維集合体を得ることができ
る。これを更にカーディングして厚物のシート状にした
繊維集合体をモールド内で加熱圧縮成形しても良い。
The fiber assembly of the present invention can be obtained by various molding methods. The first is to blow open short fibers together with gas (air) into a mold that has a ventilation hole, and discharge only this air from a large number of pores, leaving only the short fibers in the mold. It is a method of filling and molding.
By such an air-conveying filling method, it is possible to fill a shape along a mold that matches a desired three-dimensional shape, and to obtain a porous fiber aggregate that is homogeneous throughout. This may be further carded to form a thick sheet-shaped fiber assembly, which may be subjected to heat compression molding in a mold.

【0009】本発明を構成する繊維集合体には結合材が
必要である。この結合材としては加熱により溶融しかつ
反応固化するフェノ−ル樹脂、あるいは蒸気吹き込みに
より反応固化するウレタン系接着剤、あるいは又基材と
なる短繊維より低い温度で溶融する熱可塑性樹脂等種々
のものがある。しかし、粉状では吹き込み充填時に粉状
結合材の偏りが生じ、分散不良を起こす他空気抜き孔に
結合材が詰まって充填不良や密度不良を起こす場合、あ
るいは結合材のみ飛散する場合があり、又一方結合材が
液状の場合には混合時に繊維の固まりができ良好な吹き
込み充填を得ることができない。
The fiber assembly constituting the present invention requires a binder. Examples of the binder include various resins such as a phenolic resin which is melted and solidified by heating, a urethane adhesive which is solidified by steam blowing, or a thermoplastic resin which is melted at a temperature lower than that of the base short fibers. There is something. However, in the powder form, the bias of the powder-like binder occurs during blow-in filling, and the dispersion may be poor.Otherwise, the binder may become clogged with the binder in the air vent holes, resulting in poor filling or poor density, or only the binder may scatter. On the other hand, when the binder is in a liquid state, the fibers are hardened at the time of mixing and a good blow filling cannot be obtained.

【0010】これに対し、繊維状の結合材を使用する場
合は開繊機等を用いて混合することにより良好な分散が
得られ、しかも繊維集合体の素材である短繊維を充填す
る場合に、何らの支障も生じない。このような繊維状の
結合材としては、加熱あるいは蒸気によって溶融する低
融点のポリエステル樹脂、あるいはポリエチレンやポリ
プロピレン等の基材となる短繊維より低い融点をもつ繊
維を使用することができる。望ましくは繊維素材が低融
点成分と高融点成分から構成され、低融点成分が高融点
成分の外側、すなわち繊維表面となるように配置してな
る複合繊維が、耐久性及び防音性能の面から好都合であ
る。すなわち、この複合繊維を低融点成分の融点より高
くかつ高融点成分の融点より低い温度で加熱成形すれ
ば、結合材繊維も完全な繊維状態のまま低融点成分の融
点により結合出来、高い耐久性と防音性を確保すること
ができる。
On the other hand, when a fibrous binder is used, good dispersion can be obtained by mixing using a fiber-spreading machine, and when the short fibers which are the material of the fiber assembly are filled, No trouble will occur. As such a fibrous binder, a polyester resin having a low melting point that is melted by heating or steam, or a fiber having a melting point lower than that of a short fiber serving as a base material such as polyethylene or polypropylene can be used. Desirably, a composite fiber in which the fiber material is composed of a low melting point component and a high melting point component, and the low melting point component is disposed outside the high melting point component, that is, on the fiber surface, is advantageous in terms of durability and soundproofing performance. Is. That is, if this composite fiber is heat-molded at a temperature higher than the melting point of the low-melting point component and lower than the melting point of the high-melting point component, the binder fiber can be bonded by the melting point of the low-melting point component in a perfect fiber state, and has high durability. And it is possible to ensure soundproofing.

【0011】上記のような繊維系結合材を混合した繊維
集合体の多孔質層の成形方法としてはホットプレスある
いは加熱モ−ルドによる成形が考えられるが、このよう
な成形方法では多孔質層が断熱効果を有するため、内部
の結合材まで溶融させるのに長時間の加熱が必要であ
り、成形サイクルを長くなってしまう。成形温度を高く
設定すれば成形サイクルを短くすることができるが、反
応硬化型以外の結合材、例えばポリエチレン繊維等の熱
可塑性結合材では、離型時にモールドを冷却しないと形
崩れを起こす可能性がある。このため、成形方法として
は、型温度を結合材融点以下に調節し、該融点以上の熱
風あるいは蒸気の吹き込みで結合材を溶融して繊維集合
体を形成する方法が望ましい。この場合、熱風により繊
維集合体の内部まで均一に溶融固化が出来、更に熱風と
冷風を調整することにより、成形サイクルを改善するこ
とができる。
As a method for forming the porous layer of the fiber assembly mixed with the above-mentioned fiber-based binder, forming by a hot press or a heating mold can be considered. In such a forming method, the porous layer is formed. Since it has a heat insulating effect, heating for a long time is required to melt even the binder inside, which lengthens the molding cycle. The molding cycle can be shortened by setting the molding temperature higher, but with binders other than the reaction-curing type, for example, thermoplastic binders such as polyethylene fiber, the shape may collapse unless the mold is cooled during release. There is. Therefore, as a molding method, it is desirable to adjust the mold temperature to be equal to or lower than the melting point of the binder and to blow the hot air or steam having the melting point or higher to melt the binder to form a fiber assembly. In this case, the hot air can uniformly melt and solidify the inside of the fiber assembly, and by adjusting the hot air and the cold air, the molding cycle can be improved.

【0012】本発明に用いる遮音シートとしては、ゴム
系、EVA系、PVC系のシートが表皮材として好適に
用いられる。なかでも、PVC(ポリ塩化ビニル)系が
望ましい。好ましいPVCシートの厚さは、面重量
1.0〜8.0Kg/m2 である。この遮音シートと繊
維集合体とを張り合せる接着剤、または粘着剤として
は、特に限定されず、エマルジョン型、溶剤型、ホット
メルト型などが好適に用いられる。遮音シートにPVC
を用いる場合は、溶剤型ニトリルゴム系、クロロプレン
系接着剤やポリエステル、エチレン酢ビ共重合体樹脂、
またはポリアミド系ホットメルト型接着剤が好ましい。
As the sound-insulating sheet used in the present invention, a rubber-based, EVA-based, or PVC-based sheet is preferably used as a skin material. Among them, PVC (polyvinyl chloride) is preferable. The preferred PVC sheet thickness is the surface weight
It is 1.0 to 8.0 Kg / m 2 . The adhesive or pressure-sensitive adhesive for bonding the sound insulation sheet and the fiber assembly together is not particularly limited, and emulsion type, solvent type, hot melt type and the like are preferably used. PVC for sound insulation sheet
When using, solvent type nitrile rubber-based, chloroprene-based adhesive or polyester, ethylene vinyl acetate copolymer resin,
Alternatively, a polyamide hot melt adhesive is preferable.

【0013】以上述べてきたように、モ−ルド内に素材
としての短繊維を繊維状の結合材と共に吹き込み結合材
を溶融させると共に一体成形する方法、又は更にカーデ
ィングなどにより得られるシート状の繊維集合体を加熱
成形して任意の形状、任意の厚さ、任意の密度の吸音層
ものが得られる。この繊維集合体の外側に遮音層として
PVCなどのシートを貼りつけ、プレス成形または真空
成形などで一体成形することにより、軽量で防音性能に
優れ、組立などが容易な防音カバーを得ることができ
た。
As described above, a short fiber as a raw material is blown into a mold together with a fibrous binder to melt the binder and integrally mold it, or a sheet-like obtained by carding or the like. The fiber assembly is heat-molded to obtain a sound absorbing layer having an arbitrary shape, an arbitrary thickness and an arbitrary density. By attaching a sheet of PVC or the like as a sound insulation layer on the outside of this fiber assembly and integrally molding it by press molding or vacuum molding, a soundproof cover that is lightweight and has excellent soundproofing performance and easy to assemble can be obtained. It was

【0014】[0014]

【作用】多数の短繊維を加熱成形して集合体とした繊維
集合体と遮音シートとを一体成形することにより、任意
の形状であって、防音性能の良い防音カバーを得ること
ができた。
By integrally molding a fiber assembly and a sound-insulating sheet by thermoforming a large number of short fibers, it is possible to obtain a sound-proof cover having an arbitrary shape and good sound-insulating performance.

【0015】以下、本発明の実施例につき、図面を参照
しつつ具体的に説明する。
Embodiments of the present invention will be specifically described below with reference to the drawings.

【実施例1】図1を参照して、本発明による防音カバー
の製造方法を、具体的に説明する。まず、エアコンディ
ショナー用コンプレッサー、アキュームレーターの形状
に一部合わせたモ−ルドを通気性のある素材であるパン
チングメタルを用いて製作した。次に、モールド(上
型)1とモールド(下型)3との間に、ポリエステル短
繊維(6デニ−ル×51m/m長さ)と、断面が二重構
造のポリエステル複合繊維(外側融点95℃、内(芯)
側融点235℃、4デニ−ル×51m/m長さ)を8:
2の比率で混合均一分散させた未加熱の繊維集合体2を
空気と共に吹き込み充填した。充填後、モールド下方の
送風口4より140℃の熱風を45秒間送り込み、更に
室温の冷風を30秒間送り込み成形し、平均厚さ8m
m、重量130gの繊維集合体を得た。この繊維集合体
に、遮音シートとして面重量3.4Kg/m2 (比重
1.7、厚さ2mm)のPVCシートを、接着剤とし
て、溶剤型クロロプレン系接着剤を用い、真空成形によ
り一体成形し、図2に示すような防音カバーを作成し
た。
EXAMPLE 1 A method for manufacturing a soundproof cover according to the present invention will be specifically described with reference to FIG. First, we made a mold partly matching the shape of the air conditioner compressor and accumulator using punching metal, which is a breathable material. Next, between the mold (upper mold) 1 and the mold (lower mold) 3, a polyester short fiber (6 denier x 51 m / m length) and a polyester composite fiber having a double structure in cross section (outer melting point) 95 ° C, inside (core)
Side melting point 235 ° C., 4 denier × 51 m / m length) 8:
The unheated fiber assembly 2 mixed and uniformly dispersed at a ratio of 2 was blown and filled with air. After filling, hot air at 140 ° C. is blown for 45 seconds from the blower port 4 below the mold, and cold air at room temperature is blown for 30 seconds to mold, and the average thickness is 8 m.
A fiber assembly having m and a weight of 130 g was obtained. A PVC sheet having a surface weight of 3.4 Kg / m 2 (specific gravity 1.7, thickness 2 mm) was used as a sound-insulating sheet, and a solvent-type chloroprene-based adhesive was used as an adhesive to integrally mold this fiber assembly by vacuum forming. Then, a soundproof cover as shown in FIG. 2 was prepared.

【0016】[0016]

【実施例2】実施例1と同じ原料の繊維集合体をカーデ
ィングしたものを目付1000g/m2 、厚さ16mm
のシート状にしたものを所定量、図1のモールド上型1
と下型3の間に入れて厚さ8mmに圧縮し、モールドの
下方送風口4から、140℃の熱風を45秒間送り込
み、その後室温の冷風を30秒間送り込んで成形した。
このようにして得られた繊維集合体を実施例1と同様に
遮音シートと一体成形して防音カバーを作成した。表1
に実施例1、実施例2の方法で製造された防音カバーの
防音特性を測定した結果を示す。図3は、実施例1の方
法で製造された防音カバーの防音特性を示している。遮
音特性は、JIS−C−9612に従って、室外機のカ
バーを取りはずして、コンプレッサーを露出した状態で
測定した。その測定結果を表1に示す。比較例1とし
て、現行品の帯状の防音カバー、即ち面重量3.4Kg
/m2(厚さ1.8mm)のPVCシートと、厚さ5m
mのフェルトとの積層体を帯状にコンプレッサーとアキ
ュムレーターに巻き付け、更に上から蓋を付けたものを
用いた。比較例2としては現行品の帯状の防音カバーと
して、面重量3.4Kg/m2(厚さ1.8mm)のP
VCシートと、厚さ8mmのフェルトとの積層体を比較
例1と同様に帯状にコンプレッサーとアキュムレーター
に巻き付け、上から蓋を付け、更にその上から配管など
も一緒に巻いて全体を覆ったものを用いた。比較例3と
して、防音カバーを付けないものの遮音性能を測定し
た。比較例2の場合は、表1、図3に示すように遮音性
能は確かに良くなるが、重量はアップし、組立の工数も
増えてしまう。実施例1及び2は、重量が軽いにもかか
わらず、比較例2と同等の優れた遮音性能が得られた。
ることが明らかとなった。
Example 2 A fiber assembly of the same raw material as in Example 1 was carded to have a basis weight of 1000 g / m 2 , and a thickness of 16 mm.
A predetermined amount of the sheet-shaped product of FIG.
It was placed between the lower mold 3 and the lower mold 3 and compressed to a thickness of 8 mm, and hot air of 140 ° C. was blown for 45 seconds from the lower blower port 4 of the mold, and then cold air of room temperature was blown for 30 seconds for molding.
The fiber assembly thus obtained was integrally molded with a sound insulating sheet in the same manner as in Example 1 to prepare a soundproof cover. Table 1
The results of measuring the soundproof properties of the soundproof covers manufactured by the methods of Examples 1 and 2 are shown in FIG. FIG. 3 shows the soundproofing characteristics of the soundproof cover manufactured by the method of Example 1. The sound insulation characteristics were measured according to JIS-C-9612 with the cover of the outdoor unit removed and the compressor exposed. The measurement results are shown in Table 1. As Comparative Example 1, the current band-shaped soundproof cover, that is, a surface weight of 3.4 Kg
/ M 2 (thickness 1.8 mm) PVC sheet and thickness 5 m
A m-felt laminated body was wound around a compressor and an accumulator in a strip shape, and a lid was attached from above. As Comparative Example 2, a P-shaped belt-shaped soundproof cover of the current product having a surface weight of 3.4 Kg / m 2 (thickness 1.8 mm) was used.
A laminate of a VC sheet and a felt having a thickness of 8 mm was wound around the compressor and the accumulator in a strip shape in the same manner as in Comparative Example 1, a lid was attached from above, and piping and the like were also wrapped from above to cover the whole. I used one. As Comparative Example 3, the sound insulation performance was measured without the soundproof cover. In the case of Comparative Example 2, as shown in Table 1 and FIG. 3, the sound insulation performance is certainly improved, but the weight is increased and the number of assembling steps is also increased. Although Examples 1 and 2 were light in weight, excellent sound insulation performance equivalent to that of Comparative Example 2 was obtained.
It became clear that.

【表1】 [Table 1]

【発明の効果】以上の説明から明らかなごとく、多数の
短繊維を加熱成形して集合体とした繊維集合体と遮音シ
ートとを一体成形することにより、軽量で任意の形状を
持ち、組み付け性の容易な遮音性能の良い防音カバーが
得られた。
As is clear from the above description, a fiber assembly having a large number of short fibers formed by heat molding and a sound insulating sheet are integrally molded, so that they have a light weight and an arbitrary shape, and are easy to assemble. A soundproof cover with good sound insulation performance was obtained.

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

【図1】図1は本発明による防音カバーの成形装置の摸
式的断面図である。
FIG. 1 is a schematic sectional view of a soundproof cover molding apparatus according to the present invention.

【図2】図2は本発明による防音カバーの縦と横の断面
図の概略を示す図面である。
FIG. 2 is a view schematically showing a vertical and horizontal sectional view of a soundproof cover according to the present invention.

【図3】図3は本発明の実施例及び比較例に係わる防音
カバーのJIS−C−9612による遮音特性の測定結
果である。
FIG. 3 is a measurement result of sound insulation characteristics according to JIS-C-9612 of sound insulation covers according to Examples and Comparative Examples of the present invention.

【符号の説明】[Explanation of symbols]

1:モ−ルド(上型) 2:未加熱の繊維集合体 3:モ−ルド(下型) 4:送風口 5:遮音シート 6:成形後の繊維集合体 1: Mold (upper mold) 2: Unheated fiber assembly 3: Mold (lower mold) 4: Air blower 5: Sound insulation sheet 6: Fiber assembly after molding

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 G10K 11/16 H02K 5/24 Z H02K 5/02 G10K 11/16 A 5/24 G ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location G10K 11/16 H02K 5/24 Z H02K 5/02 G10K 11/16 A 5/24 G

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 多数の短繊維を加熱成形して集合体とし
た繊維集合体と遮音シートとを一体成形したことを特徴
とする防音カバー。
1. A soundproof cover comprising a sound-insulating sheet and a fiber assembly formed by integrally molding a plurality of short fibers by thermoforming.
【請求項2】 前記短繊維の繊維径分布の中心が50デ
ニ−ル以下であり、また前記繊維集合体の平均見掛け密
度が0.01〜0.50g/cm3 であることを特徴と
する請求項1記載の防音カバー。
2. The center of the fiber diameter distribution of the short fibers is 50 denier or less, and the average apparent density of the fiber assembly is 0.01 to 0.50 g / cm 3. The soundproof cover according to claim 1.
【請求項3】 前記繊維集合体が、低融点の短繊維から
成る結合材を少なくとも5重量%以上含むことを特徴と
する請求項1又は2に記載の防音カバー。
3. The soundproof cover according to claim 1, wherein the fiber assembly contains at least 5% by weight or more of a binder made of short fibers having a low melting point.
【請求項4】 前記繊維集合体が、多数の短繊維を加熱
成形して平均見掛け密度を0.005〜0.15g/c
3 としたプレ繊維集合体を2〜10倍に圧縮して成形
したことを特徴とする請求項1乃至3のいずれか1項に
記載の防音カバー。
4. The fiber assembly is formed by heating a large number of short fibers to form an average apparent density of 0.005 to 0.15 g / c.
soundproof cover according to any one of claims 1 to 3 m 3 and the pre-fiber aggregate of characterized by being molded by compressing the 2-10 fold.
【請求項5】 前記遮音シートが、面重量1.0〜8.
0Kg/m2 のゴム製又は合成樹脂製のシートであるこ
とを特徴とする請求項1乃至4のいずれか1項に記載の
防音カバー。
5. The sound insulation sheet has a surface weight of 1.0 to 8.
The soundproof cover according to any one of claims 1 to 4, which is a sheet made of rubber or synthetic resin having a weight of 0 kg / m 2 .
【請求項6】 多数の短繊維を空気と共にモ−ルド内へ
吹き込んだ後、加熱成形して繊維集合体とし、さらに該
繊維集合体と遮音シートとを一体成形することを特徴と
する防音カバーの製造方法。
6. A soundproof cover characterized in that a large number of short fibers are blown into a mold together with air and then heat-formed into a fiber aggregate, and the fiber aggregate and a sound insulating sheet are integrally formed. Manufacturing method.
【請求項7】 前記加熱成形が前記モ−ルド内への熱風
又は蒸気の吹き込みによるものであることを特徴とする
請求項6記載の防音カバーの製造方法。
7. The method of manufacturing a soundproof cover according to claim 6, wherein the hot molding is performed by blowing hot air or steam into the mold.
JP7058912A 1995-03-17 1995-03-17 Sound insulation cover and manufacture thereof Pending JPH08258191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7058912A JPH08258191A (en) 1995-03-17 1995-03-17 Sound insulation cover and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7058912A JPH08258191A (en) 1995-03-17 1995-03-17 Sound insulation cover and manufacture thereof

Publications (1)

Publication Number Publication Date
JPH08258191A true JPH08258191A (en) 1996-10-08

Family

ID=13098036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7058912A Pending JPH08258191A (en) 1995-03-17 1995-03-17 Sound insulation cover and manufacture thereof

Country Status (1)

Country Link
JP (1) JPH08258191A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000267673A (en) * 1999-03-17 2000-09-29 Bridgestone Corp Sound absorbing material
JP2013504461A (en) * 2009-09-16 2013-02-07 オートニアム マネジメント アクチエンゲゼルシャフト Molded products for automotive panels
US20140050886A1 (en) * 2011-03-23 2014-02-20 Autoneum Management Ag Moulded multilayer lining for heat and sound insulation
JP2014081638A (en) * 2013-11-25 2014-05-08 Hirotani:Kk Manufacturing method of soundproof material for vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000267673A (en) * 1999-03-17 2000-09-29 Bridgestone Corp Sound absorbing material
JP2013504461A (en) * 2009-09-16 2013-02-07 オートニアム マネジメント アクチエンゲゼルシャフト Molded products for automotive panels
US20140050886A1 (en) * 2011-03-23 2014-02-20 Autoneum Management Ag Moulded multilayer lining for heat and sound insulation
JP2014514185A (en) * 2011-03-23 2014-06-19 オートニアム マネジメント アクチエンゲゼルシャフト Molded multilayer lining for thermal insulation and sound insulation
US9586380B2 (en) * 2011-03-23 2017-03-07 Autoneum Management Ag Moulded multilayer lining for heat and sound insulation
JP2014081638A (en) * 2013-11-25 2014-05-08 Hirotani:Kk Manufacturing method of soundproof material for vehicle

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