JPH08223855A - Sound-proof cover and its manufacture - Google Patents
Sound-proof cover and its manufactureInfo
- Publication number
- JPH08223855A JPH08223855A JP7020094A JP2009495A JPH08223855A JP H08223855 A JPH08223855 A JP H08223855A JP 7020094 A JP7020094 A JP 7020094A JP 2009495 A JP2009495 A JP 2009495A JP H08223855 A JPH08223855 A JP H08223855A
- Authority
- JP
- Japan
- Prior art keywords
- soundproof cover
- fiber
- mold
- short fibers
- fiber assembly
- 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
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、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 motors and the like and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来のモーターなどの防音用のカバー
は、フェルトやウレタンフォーム等の吸音材料をモータ
ーや電動機等の形状に合わせて切断し、接着剤等を用い
て張り合せて立体的に形成し、騒音発生部の外側を覆う
というものが一般的であった。2. Description of the Related Art A conventional soundproofing cover for a motor or the like is three-dimensionally formed by cutting a sound absorbing material such as felt or urethane foam in accordance with the shape of a motor or an electric motor and adhering it with an adhesive or the like. However, it is common to cover the outside of the noise generating part.
【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、立体的に成形するには手間がかか
り過ぎるし、外観的にきれいに見栄え良く仕上げること
が難しいという問題があった。又、性能的にも、従来品
は吸音材の隙間や、密度の不均質等の影響で音が漏れる
等という問題もあった。更に、切り張りで成形するのは
部品数がどうしても多くなってしまい、取り付け費用等
を含めてコスト高となってしまう。又、この防音カバー
を従来の一体成形方法で成形すると、角度のある立体形
状にすること、即ち深絞り成形すると、局部的に薄くな
ってしまったり、破れる等の不具合が生じてしまう。As described above, the conventional soundproof cover has a problem that it takes too much time to form it three-dimensionally, and it is difficult to finish it neatly and visually. Further, in terms of performance, the conventional product also has a problem that sound leaks due to the gap of the sound absorbing material or the influence of non-uniformity of the density. Furthermore, the number of parts inevitably increases when forming by cutting, which increases the cost including the mounting cost. Further, if this soundproof cover is molded by the conventional integral molding method, if it is formed into an angled three-dimensional shape, that is, if it is deep-drawn, problems such as local thinning and tearing occur.
【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、一体成形により、製造時の作業性
が良く、取り付けが容易な、高性能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 high-performance soundproof cover which is easily molded and has good workability during manufacture by integral molding. .
【０００５】[0005]
【課題を解決するための手段】本発明では、短繊維を集
合体に成形した繊維集合体を加熱溶融一体成形した防音
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。即ち、繊維成形体を立体的に成形する際にモ
ールドの下型と上型の角部の形状を最適に設計すること
により、本発明の防音カバーの立体的な成形部分の深絞
り角度を４５°〜９０°即ち底付き円筒形、または底付
き角柱形、またはフランジを有する底付き円筒形、また
はフランジを有する底付き角柱形の防音カバーの底面の
延長線と側面、またはフランジの延長線と側面との角度
が４５°〜９０°という従来では困難であった鋭角的な
角度のものが一体成形で作ることが可能となった。特に
７０°以上の深絞り角度にすることにより、効率の良い
立体構造の形状を成形することができる。SUMMARY OF THE INVENTION In the present invention, the above-mentioned problems are solved by using a soundproof cover in which a fiber assembly formed by forming short fibers into an assembly is integrally formed by heating and melting. That is, by optimally designing the shapes of the lower and upper molds of the mold when the fiber molded body is three-dimensionally molded, the deep drawing angle of the three-dimensional molded portion of the soundproof cover of the present invention is 45. ° to 90 °, ie, a bottomed cylindrical shape, a bottomed prismatic shape, a bottomed cylindrical shape having a flange, or a bottomed prismatic soundproof cover having an extension line and a side surface or an extension line of a flange. It is now possible to integrally form an acute angle of 45 ° to 90 ° with the side face, which was difficult in the past. Particularly, by setting the deep drawing angle to 70 ° or more, the shape of the three-dimensional structure can be efficiently formed.
【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３０デニ−ル以下の細い短繊維を用いると共に、見
かけ密度を所定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３０デニ−ル以上の繊維を用いると、同一
見かけ密度において粗な状態になり、通気抵抗が上がら
ず吸音特性の劣ったものになる。見かけ密度を高くして
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、見かけ密度を高くすること
は、重量アップにつながり、軽量化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、
見かけ密度の上限は０．３０ｇ／ｃｍ3 以下に設定する
必要がある。また、３０デニ−ル以下の細い繊維を用い
ても、見かけ密度が０．０３ｇ／ｃｍ3 以下では、通気
抵抗が大きくならず、防音性を期待できない。さらに好
ましい平均見かけ密度は、０．０５〜０．１０ｇ／ｃｍ
3 である。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 30 denier or less are used, and the apparent density is set within a predetermined range to increase the ventilation resistance inside the fiber assembly. The sound absorption characteristics were improved. If fibers having a center of fiber diameter distribution of 30 denier or more are used, the fibers will be in a coarse state at the same apparent density, and the ventilation resistance will not increase and the sound absorption characteristics will be inferior. When the apparent density is increased to improve the soundproofness, the soundproofing performance is deteriorated because it becomes too hard. Furthermore, increasing the apparent density leads to an increase in weight, which is not preferable for weight reduction. From these viewpoints, in order to achieve the object of the present invention,
The upper limit of the apparent density needs to be set to 0.30 g / cm 3 or less. Even if a thin fiber having a denier of 30 denier or less is used, if the apparent density is 0.03 g / cm 3 or less, the ventilation resistance does not increase, and the soundproofing cannot be expected. A more preferable average apparent density is 0.05 to 0.10 g / cm.
Is 3 .
【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３０デニ
−ル以下とし、高吸音性能を実現するためには、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、ポリスチレン、ナイロン、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-based distribution center of 30 denier or less, and 15 denier or less in order to realize high sound absorption performance. It is desirable to use short fibers of As the material of the short fiber as the material, for example, in addition to synthetic fibers such as polyester, polypropylene, polystyrene, nylon 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。まず、第一は、開繊してバラバラにな
った短繊維を気体（空気）と共にモ−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
に均質な多孔質を得ることができる。第二の方法は、ニ
ードルパンチによりシート状にした低融点の短繊維の結
合材を含む短繊維集合体をモールド内に装填して熱成形
する方法である。The fiber assembly of the present invention can be obtained by various molding methods. First of all, the short fibers that have been opened and broken apart are blown into the mold together with the gas (air), and only this air is discharged from many pores, and only the short fibers are put into the mold. It is a method of filling and molding. With 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 homogeneous porous material as a whole. The second method is a method in which a short fiber aggregate containing a binder of low melting point short fibers formed into a sheet by needle punching is loaded into a mold and thermoformed.
【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。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.
【００１１】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。That is, when the 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, It is possible to secure high durability and soundproofing.
【００１２】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、成形サイクルを短くすることが困難である。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と共
に一体化する方法が望ましい。この場合、熱風及び冷風
の切り替え手段を付加すれば、更に成形サイクルを改善
することができるし、熱風などの吹き込みにより多孔質
内部まで均一な溶融固化ができる。As a method for forming the porous layer of the fiber assembly mixed with the above-mentioned fiber-based binder, forming by hot pressing or heating mold can be considered. In such forming method, the porous layer is formed. Since it has an adiabatic effect, it takes a long time to melt even the binder inside, and it is difficult to shorten the molding cycle. If the molding temperature is set high, the molding cycle can be shortened. However, a binder other than the reaction-curing type, for example, a thermoplastic binder such as polyethylene fiber may be deformed at the time of release. 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 aggregate and integrate the fibers. In this case, if a means for switching between hot air and cold air is added, the molding cycle can be further improved, and uniform blowing and solidification of the inside of the porous material can be achieved by blowing hot air or the like.
【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、又はニードルパ
ンチによりシート状にした低融点の短繊維の結合材を含
む繊維集合体をモールド内に装填し熱成形する方法等に
より、軽量でかつ任意の形状の防音カバーを得ることが
できた。このような繊維集合体による多孔質成形体を用
いることにより、接着剤を塗布或は貼り合わせ、乾燥等
の工程が不要となり、寸法精度が高く、防音性能に優
れ、取扱の容易な防音カバーを得ることができた。As described above, short fibers as a raw material are blown into a mold together with a fibrous binder to melt the binder and integrally mold it, or it is formed into a sheet by needle punching and has a low melting point. A lightweight and soundproof cover of any shape could be obtained by, for example, loading a fiber assembly containing a short fiber binder into a mold and thermoforming. By using a porous molded body made of such a fiber aggregate, there is no need for steps such as applying or bonding an adhesive and drying, and a dimensional accuracy is high, a soundproof performance is excellent, and a soundproof cover is easy to handle. I was able to get it.
【００１４】[0014]
【作用】短繊維を集合体に成形した繊維集合体を加熱溶
融一体成形することにより、任意の形状の防音性能の良
い防音カバーを得ることができた。The sound-insulating cover having an arbitrary sound-insulating performance can be obtained by heat-melting and integrally molding a fiber assembly in which short fibers are formed into an assembly.
【００１５】以下に本発明を図面を参照して実施例につ
いて具体的に説明する。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、防音カバーの
形状に合致したモ−ルド（成形型）を製作し、図１の様
に配置した。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×５
１ｍ／ｍ長さ）と、断面が二重構造のポリエステル繊維
（外側融点９５℃、内（芯）側融点２３５℃）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（上型）１
を製品厚さ mmの位置まで降下させ、下方の送風口４
より１３０℃〜１５０℃の熱風を１分間送り込み、更に
１分間室温の冷風を送り込み成形した。なお本発明によ
る防音カバーの製造装置は、モールド（上型）１、モー
ルド（下型）３共にパンチングメタルで構成されている
ので、熱風、冷風の吹き込みによる成形ができる。EXAMPLE 1 A method for manufacturing a soundproof cover according to the present invention will be specifically described with reference to FIG. First, a mold (molding die) conforming to the shape of the soundproof cover was manufactured and arranged as shown in FIG. Next, between the mold (upper mold 1) and the mold (lower mold) 3, polyester short fibers (6 denier x 5)
1 m / m length) and 8: 2 of polyester fiber (melting point outside 95 ° C., melting point inside (core) side 235 ° C.) having a double structure in cross section
The unheated fiber assembly 2 mixed and uniformly dispersed at a ratio of was blown and filled with air. Mold after filling (upper mold) 1
Lower to the position where the product thickness is mm and lower the air blower 4
Hot air at 130 ° C. to 150 ° C. was blown in for 1 minute, and cold air at room temperature was blown in for 1 minute to perform molding. Since the mold (upper mold) 1 and the mold (lower mold) 3 are both made of punching metal in the soundproof cover manufacturing apparatus according to the present invention, molding can be performed by blowing hot air or cold air.
【００１６】[0016]
【実施例２】上記実施例１に示した製造装置（図１）を
使用し、まず、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繊維（外側
融点９５℃、内（芯）側融点２３５℃）を８：２の比率
で混合均一分散させ、ニードルパンチによりシート状に
した未加熱の繊維集合体２を装填した。次に、モールド
（上型）１を製品厚さまで降下させ、下方の送風口４よ
り１３０℃〜１５０℃の熱風を１分間送り込み、更に１
分間室温の冷風を送り込み成形した。Second Embodiment Using the manufacturing apparatus (FIG. 1) shown in the first embodiment, first, the mold (upper mold) 1 and the mold (lower mold) are used.
Between 3 and 3 polyester short fibers (6 denier x 51 m /
m length) and polyester fiber having a double cross-section (melting point outside 95 ° C., melting point inside (core) 235 ° C.) at a ratio of 8: 2 and uniformly dispersed, and made into a sheet by needle punching and not heated. Of the fiber assembly 2 was loaded. Next, the mold (upper mold) 1 is lowered to the product thickness, and hot air of 130 ° C to 150 ° C is blown through the lower blower port 4 for 1 minute, and further 1
Molding was performed by sending cold air at room temperature for a minute.
【００１７】[0017]
【実施例３】図２は、実施例１または実施例２の方法で
製造された防音カバーの模式的断面図である。防音カバ
ー５は、モーター６の回転部９の周囲を完全に覆う形状
に成形されている。従って、防音効果は大きく、モータ
ーの回転部などにごみや埃が入りにくい構造になってい
る。Third Embodiment FIG. 2 is a schematic sectional view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 is formed in a shape that completely covers the periphery of the rotating portion 9 of the motor 6. Therefore, it has a large soundproof effect, and has a structure in which dust and dirt do not easily enter the rotating portion of the motor.
【実施例４】図３は、実施例１または実施例２の方法で
製造された防音カバーの模式的平面図である。防音カバ
ー５は、モーター６の回転方向の直角な面に通気孔７を
設けて通気性を確保している。図４は、図３の防音カバ
ーの模式的斜視図である。Fourth Embodiment FIG. 3 is a schematic plan view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 has ventilation holes 7 formed on a surface perpendicular to the rotation direction of the motor 6 to ensure air permeability. FIG. 4 is a schematic perspective view of the soundproof cover of FIG.
【実施例５】図５は、実施例１または実施例２の方法で
製造された防音カバーの模式的断面図である。防音カバ
ー５は、通気性を確保するために、モーター回転部９と
の間にすき間１１を設けている。Fifth Embodiment FIG. 5 is a schematic cross-sectional view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 is provided with a gap 11 between the soundproof cover 5 and the motor rotating portion 9 in order to ensure air permeability.
【実施例６】図６は、実施例１または実施例２の方法で
製造された防音カバーの模式的断面図である。防音カバ
ー５は、モーター６の回転部９の周囲を覆う形状に成形
されており、通気性を大きくするため、円筒形の底面１
２に。切れ込み１３を入れている。図７は、図６の防音
カバーの底面を上から見た図である。[Sixth Embodiment] FIG. 6 is a schematic sectional view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 is formed in a shape that covers the periphery of the rotating portion 9 of the motor 6, and has a cylindrical bottom surface 1 in order to increase air permeability.
To 2. Notch 13 is made. FIG. 7 is a view of the bottom surface of the soundproof cover of FIG. 6 viewed from above.
【実施例７】図８は、実施例１または実施例２の方法で
製造された防音カバーの模式的斜視図である。図８の防
音カバー５は、電気掃除機のモーター用の防音カバー
で、モーターに密着するような形状に成形されている。
防音カバーの底面１２に、切れ込み１３を入れ、そのカ
ット部分をほぼ水平に伸ばした状態で、掃除機のモータ
ーに取り付け、通気性を確保した。この時の防音性能を
ＪＩＳ Ｃ９１０８により測定した。上方向１ｍの位置
で測定した周波数と音圧レベルを図９に、同様に横方向
１ｍの位置で測定した周波数と音圧レベルを図１０に示
す。音圧レベルのオーバーオール値を表１に示す。比較
例として、モーターの外周部にウレタンフォームを巻
き、更に外側のケーシングの内側にフェルトを貼りつけ
たものを用い同様に防音性能を測定した。同様にその結
果を図９、図１０、表１に示す。横方向、上方向とも実
施例７の方が防音性能が優れていることが明らかとなっ
た。Seventh Embodiment FIG. 8 is a schematic perspective view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 shown in FIG. 8 is a soundproof cover for a motor of an electric vacuum cleaner, and is formed into a shape that is in close contact with the motor.
A notch 13 was made on the bottom surface 12 of the soundproof cover, and the cut portion was attached to a motor of a vacuum cleaner in a state where the cut portion was extended substantially horizontally to ensure air permeability. The soundproofing performance at this time was measured according to JIS C9108. FIG. 9 shows the frequency and sound pressure level measured at the position of 1 m in the upward direction, and FIG. 10 shows the frequency and sound pressure level similarly measured at the position of 1 m in the lateral direction. Table 1 shows the overall value of the sound pressure level. As a comparative example, a urethane foam was wound around the outer periphery of the motor, and the outer casing was further covered with felt. Similarly, the results are shown in FIGS. 9 and 10 and Table 1. It was revealed that the soundproofing performance of Example 7 was superior in both the lateral direction and the upward direction.
【表１】 [Table 1]
【発明の効果】以上の説明から明らかなごとく、繊維径
分布の中心が３０デニ−ル以下の短繊維を素材とし、こ
れを平均見掛け密度０．０３〜０．３０ｇ／ｃｍ3 の繊
維集合体に成形したものを加熱溶融一体成形することに
より、形状保持性に優れた、よってモーターなどへの取
り付け作業が容易な、防音性能の良い防音カバーが得ら
れた。As is apparent from the above description, a short fiber having a fiber diameter distribution center of 30 denier or less is used as a raw material, and a fiber aggregate having an average apparent density of 0.03 to 0.30 g / cm 3 is used. By heat-melting and integrally molding the molded product, a soundproof cover with excellent shape retention and easy installation work on a motor etc. and good soundproofing performance was obtained.
【図１】図１は本発明による防音カバーの成型装置の摸
式的断面図である。FIG. 1 is a schematic cross-sectional view of a soundproof cover molding apparatus according to the present invention.
【図２】図２は本発明の実施例３に係わる防音カバーの
断面図の概略を示す。FIG. 2 is a schematic sectional view of a soundproof cover according to a third embodiment of the present invention.
【図３】図３は本発明の実施例４に係わる防音カバーの
平面図の概略を示す。FIG. 3 is a schematic plan view of a soundproof cover according to a fourth embodiment of the present invention.
【図４】図４は本発明の実施例４に係わる防音カバーの
斜視図の概略を示す。FIG. 4 is a schematic perspective view of a soundproof cover according to a fourth embodiment of the present invention.
【図５】図５は本発明の実施例５に係わる防音カバーの
断面図の概略を示す。FIG. 5 is a schematic sectional view of a soundproof cover according to a fifth embodiment of the present invention.
【図６】図６は本発明の実施例６に係わる防音カバーの
断面図の概略を示す。FIG. 6 is a schematic sectional view of a soundproof cover according to a sixth embodiment of the present invention.
【図７】図７は本発明の実施例６に係わる防音カバーの
底面の上から見た図の概略を示す。FIG. 7 is a schematic view of a soundproof cover according to a sixth embodiment of the present invention as viewed from above the bottom surface thereof.
【図８】図８は本発明の実施例７に係わる防音カバーの
斜視図の概略を示す。FIG. 8 is a schematic perspective view of a soundproof cover according to a seventh embodiment of the present invention.
【図９】図９は本発明の実施例７に係わる防音カバーの
上方向１ｍの位置で測定した防音性能（周波数と音圧レ
ベル）を示す。FIG. 9 shows the soundproof performance (frequency and sound pressure level) measured at a position 1 m above in the soundproof cover according to Example 7 of the present invention.
【図１０】図１０は本発明の実施例７に係わる防音カバ
ーの横方向１ｍの位置で測定した防音性能（周波数と音
圧レベル）を示す。FIG. 10 shows the soundproof performance (frequency and sound pressure level) measured at a position 1 m in the lateral direction of the soundproof cover according to Example 7 of the present invention.
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：防音カバー ６：モーター ７：通気孔 ８：取り付け孔 ９：モーター回転部 １０：モーター排気窓 １１：すき間 １２：防音カバーの底面 １３：防音カバーの底面の切れ込み 1: Mold (upper mold) 2: Unheated fiber assembly 3: Mold (lower mold) 4: Air blower port 5: Soundproof cover 6: Motor 7: Vent hole 8: Mounting hole 9: Motor rotating part 10: Motor exhaust window 11: Clearance 12: Bottom of soundproof cover 13: Notch on bottom of soundproof cover
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成７年８月７日[Submission date] August 7, 1995
【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】００１５[Name of item to be corrected] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１５】以下に本発明を図面を参照して実施例につ
いて具体的に説明する。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、防音カバーの
形状に合致したモ−ルド（成形型）を製作し、図１の様
に配置した。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×５
１ｍ／ｍ長さ）と、断面が二重構造のポリエステル繊維
（外側融点９５℃、内（芯）側融点２３５℃）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（上型）１
を製品厚さ７mmの位置まで降下させ、下方の送風口４よ
り１３０℃〜１５０℃の熱風を１分間送り込み、更に１
分間室温の冷風を送り込み成形した。なお本発明による
防音カバーの製造装置は、モールド（上型）１、モール
ド（下型）３共にパンチングメタルで構成されているの
で、熱風、冷風の吹き込みによる成形ができる。EXAMPLE 1 A method for manufacturing a soundproof cover according to the present invention will be specifically described with reference to FIG. First, a mold (molding die) conforming to the shape of the soundproof cover was manufactured and arranged as shown in FIG. Next, between the mold (upper mold 1) and the mold (lower mold) 3, polyester short fibers (6 denier x 5)
1 m / m length) and 8: 2 of polyester fiber (melting point outside 95 ° C., melting point inside (core) side 235 ° C.) having a double structure in cross section
The unheated fiber assembly 2 mixed and uniformly dispersed at a ratio of was blown and filled with air. Mold after filling (upper mold) 1
To a position where the product thickness is 7 mm, and blow hot air of 130 ° C to 150 ° C for 1 minute from the blower port 4 on the lower side.
Molding was performed by sending cold air at room temperature for a minute. Since the mold (upper mold) 1 and the mold (lower mold) 3 are both made of punching metal in the soundproof cover manufacturing apparatus according to the present invention, molding can be performed by blowing hot air or cold air.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１７[Correction target item name] 0017
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１７】[0017]
【実施例３】図２は、実施例１または実施例２の方法で
製造された防音カバーの模式的断面図である。防音カバ
ー５は、モーター６の回転部９の周囲を完全に覆う形状
に成形されている。従って、防音効果は大きく、モータ
ーの回転部などにごみや埃が入りにくい構造になってい
る。Third Embodiment FIG. 2 is a schematic sectional view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 is formed in a shape that completely covers the periphery of the rotating portion 9 of the motor 6. Therefore, it has a large soundproof effect, and has a structure in which dust and dirt do not easily enter the rotating portion of the motor.
【実施例４】図３は、実施例１または実施例２の方法で
製造された防音カバーの模式的平面図である。防音カバ
ー５は、モーター６の回転方向の直角な面に通気孔７を
設けて通気性を確保している。図４は、図３の防音カバ
ーの模式的斜視図である。Fourth Embodiment FIG. 3 is a schematic plan view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 has ventilation holes 7 formed on a surface perpendicular to the rotation direction of the motor 6 to ensure air permeability. FIG. 4 is a schematic perspective view of the soundproof cover of FIG.
【実施例５】図５は、実施例１または実施例２の方法で
製造された防音カバーの模式的断面図である。防音カバ
ー５は、通気性を確保するために、モーター回転部９と
の間にすき間１１を設けている。Fifth Embodiment FIG. 5 is a schematic cross-sectional view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 is provided with a gap 11 between the soundproof cover 5 and the motor rotating portion 9 in order to ensure air permeability.
【実施例６】図６は、実施例１または実施例２の方法で
製造された防音カバーの模式的断面図である。防音カバ
ー５は、モーター６の回転部９の周囲を覆う形状に成形
されており、通気性を大きくするため、円筒形の底面１
２に。切れ込み１３を入れている。図７は、図６の防音
カバーの底面を上から見た図である。[Sixth Embodiment] FIG. 6 is a schematic sectional view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 is formed in a shape that covers the periphery of the rotating portion 9 of the motor 6, and has a cylindrical bottom surface 1 in order to increase air permeability.
To 2. Notch 13 is made. FIG. 7 is a view of the bottom surface of the soundproof cover of FIG. 6 viewed from above.
【実施例７】図８は、実施例１または実施例２の方法で
製造された防音カバーの模式的斜視図である。図８の防
音カバー５は、電気掃除機のモーター用の防音カバー
で、モーターに密着するような形状に成形されている。
防音カバーの底面１２に、切れ込み１３を入れ、そのカ
ット部分をほぼ水平に伸ばした状態で、掃除機のモータ
ーに取り付け、通気性を確保した。この時の防音性能を
ＪＩＳ Ｃ９１０８により測定した。上方向１ｍの位置
で測定した周波数と音圧レベルを図９に、同様に横方向
１ｍの位置で測定した周波数と音圧レベルを図１０に示
す。音圧レベルのオーバーオール値を表１に示す。比較
例として、モーターの外周部にウレタンフォームを巻
き、更に外側のケーシングの内側にフェルトを貼りつけ
たものを用い同様に防音性能を測定した。同様にその結
果を図９、図１０、表１に示す。横方向、上方向とも実
施例７の方が防音性能が優れていることが明らかとなっ
た。Seventh Embodiment FIG. 8 is a schematic perspective view of a soundproof cover manufactured by the method of the first or second embodiment. The soundproof cover 5 shown in FIG. 8 is a soundproof cover for a motor of an electric vacuum cleaner, and is formed into a shape that is in close contact with the motor.
A notch 13 was made on the bottom surface 12 of the soundproof cover, and the cut portion was attached to a motor of a vacuum cleaner in a state where the cut portion was extended substantially horizontally to ensure air permeability. The soundproofing performance at this time was measured according to JIS C9108. FIG. 9 shows the frequency and sound pressure level measured at the position of 1 m in the upward direction, and FIG. 10 shows the frequency and sound pressure level similarly measured at the position of 1 m in the lateral direction. Table 1 shows the overall value of the sound pressure level. As a comparative example, a urethane foam was wound around the outer periphery of the motor, and the outer casing was further covered with felt. Similarly, the results are shown in FIGS. 9 and 10 and Table 1. It was revealed that the soundproofing performance of Example 7 was superior in both the lateral direction and the upward direction.
【表１】 [Table 1]
【発明の効果】以上の説明から明らかなごとく、繊維径
分布の中心が３０デニ−ル以下の短繊維を素材とし、こ
れを平均見掛け密度０．０３〜０．３０ｇ／ｃｍ3 の繊
維集合体に成形したものを加熱溶融一体成形することに
より、形状保持性に優れた、よってモーターなどへの取
り付け作業が容易な、防音性能の良い防音カバーが得ら
れた。As is apparent from the above description, a short fiber having a fiber diameter distribution center of 30 denier or less is used as a raw material, and a fiber aggregate having an average apparent density of 0.03 to 0.30 g / cm 3 is used. By heat-melting and integrally molding the molded product, a soundproof cover with excellent shape retention and easy installation work on a motor etc. and good soundproofing performance was obtained.
Claims (5)
加熱溶融一体成形したことを特徴とする防音カバー。1. A soundproof cover, characterized in that a fiber assembly formed by forming short fibers into an assembly is integrally formed by heating and melting.
たはフランジを有する底付き円筒形、またはフランジを
有する底付き角柱形の前記防音カバーの底面の延長線と
側面、またはフランジの延長線と側面との角度が４５°
〜９０°の範囲であることを特徴とする請求項１記載の
防音カバー。2. A bottom extension and a side of the soundproof cover having a bottomed cylindrical shape, a bottomed prismatic shape, a bottomed cylindrical shape having a flange, or a bottomed prismatic shape having a flange, or an extension line of a flange. And the angle between the side and the side is 45 °
The soundproof cover according to claim 1, wherein the soundproof cover is in the range of 90 °.
３０デニ−ル以下の短繊維で、平均見掛け密度０．０３
〜０．３０ｇ／ｃｍ3 の繊維集合体に成形されたことを
特徴とする請求項１、又は請求項２記載の防音カバー。3. The fiber assembly is a short fiber having a fiber diameter distribution center of 30 denier or less, and an average apparent density of 0.03.
The soundproof cover according to claim 1 or 2, wherein the soundproof cover is formed into a fiber aggregate of 0.30 g / cm 3 .
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、請求項２又は請求項３のいずれか１項に
記載の防音カバー。4. The fiber assembly according to claim 1, wherein the fiber assembly contains at least 5% by weight or more of a binder composed of short fibers having a low melting point. Soundproof cover.
んで繊維集合体を成形し、さらに該繊維集合体を加熱溶
融一体成形することを特徴とする防音カバーの製造方
法。5. A method for producing a soundproof cover, characterized in that short fibers are blown into the mold together with air to form a fiber assembly, and the fiber assembly is heat-melted and integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7020094A JPH08223855A (en) | 1995-02-08 | 1995-02-08 | Sound-proof cover and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7020094A JPH08223855A (en) | 1995-02-08 | 1995-02-08 | Sound-proof cover and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08223855A true JPH08223855A (en) | 1996-08-30 |
Family
ID=12017535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7020094A Pending JPH08223855A (en) | 1995-02-08 | 1995-02-08 | Sound-proof cover and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08223855A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012511108A (en) * | 2008-12-04 | 2012-05-17 | イーマン８ ピーティワイ リミテッド | Nonwoven textile made from short fibers |
| US9546439B2 (en) | 2014-05-15 | 2017-01-17 | Zephyros, Inc. | Process of making short fiber nonwoven molded articles |
| US10113322B2 (en) | 2014-12-08 | 2018-10-30 | Zephyros, Inc. | Vertically lapped fibrous flooring |
| US10460715B2 (en) | 2015-01-12 | 2019-10-29 | Zephyros, Inc. | Acoustic floor underlay system |
| US10755686B2 (en) | 2015-01-20 | 2020-08-25 | Zephyros, Inc. | Aluminized faced nonwoven materials |
| CN115149710A (en) * | 2022-09-02 | 2022-10-04 | 福安市万里电机有限公司 | Noise reduction type motor that massage armchair was used |
| US11541626B2 (en) | 2015-05-20 | 2023-01-03 | Zephyros, Inc. | Multi-impedance composite |
-
1995
- 1995-02-08 JP JP7020094A patent/JPH08223855A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012511108A (en) * | 2008-12-04 | 2012-05-17 | イーマン８ ピーティワイ リミテッド | Nonwoven textile made from short fibers |
| US9315930B2 (en) | 2008-12-04 | 2016-04-19 | Zephyros, Inc. | Nonwoven textile made from short fibers |
| US9546439B2 (en) | 2014-05-15 | 2017-01-17 | Zephyros, Inc. | Process of making short fiber nonwoven molded articles |
| US10329701B2 (en) | 2014-05-15 | 2019-06-25 | Zephyros, Inc. | Method of forming a nonwoven molded article |
| US10113322B2 (en) | 2014-12-08 | 2018-10-30 | Zephyros, Inc. | Vertically lapped fibrous flooring |
| US11542714B2 (en) | 2014-12-08 | 2023-01-03 | Zephyros, Inc. | Vertically lapped fibrous flooring |
| US10460715B2 (en) | 2015-01-12 | 2019-10-29 | Zephyros, Inc. | Acoustic floor underlay system |
| US10755686B2 (en) | 2015-01-20 | 2020-08-25 | Zephyros, Inc. | Aluminized faced nonwoven materials |
| US11541626B2 (en) | 2015-05-20 | 2023-01-03 | Zephyros, Inc. | Multi-impedance composite |
| CN115149710A (en) * | 2022-09-02 | 2022-10-04 | 福安市万里电机有限公司 | Noise reduction type motor that massage armchair was used |
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