JPH0365036A - Fabrication of acoustic member - Google Patents
Fabrication of acoustic memberInfo
- Publication number
- JPH0365036A JPH0365036A JP19822889A JP19822889A JPH0365036A JP H0365036 A JPH0365036 A JP H0365036A JP 19822889 A JP19822889 A JP 19822889A JP 19822889 A JP19822889 A JP 19822889A JP H0365036 A JPH0365036 A JP H0365036A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- absorbing material
- sound absorbing
- acoustic material
- skin layer
- 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
Landscapes
- Motor Or Generator Frames (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明は、構造物の素材酸るいは、例えば電気機器等
の部品として用いる吸音材の製造方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a sound absorbing material used as a material for structures, for example, as a part of electrical equipment.
［従来の技術］
従来、騒音を遮断するための吸音材には、次のようなも
のがある。[Prior Art] Conventionally, sound absorbing materials for blocking noise include the following.
ａ 発泡プラスチックス、発泡ゴム（スポンジ）や発泡
セラミックス等で作った素材を加工して、所要の構造物
や部品として使用した吸音材。a Sound-absorbing materials made from foamed plastics, foamed rubber (sponge), foamed ceramics, etc., and used as required structures and parts.
ｂ ガラス繊維、岩綿、天然繊維酸るいは化学繊維を不
織布、マット成るいはフェルトにした素材を所要の構造
物や部品として使用した吸音材。b Sound-absorbing materials that use glass fiber, rock wool, natural fiber acid, or chemical fiber as non-woven fabric, mat, or felt as required structures and parts.
ａ及びｂに示したものは、他の不通気性の樹脂等の基板
或いは構造物や部品のライニングとして使用するもので
ある。The materials shown in a and b are used as substrates made of other impermeable resins or as linings for structures and parts.
Ｃ前記ａ及びｂの外、各種の繊維や各種の粉粒体を接合
剤と混和して、他の不通気性の基板類或いは構造物や部
品に吹付けたり、塗布してライニングとして使用するも
のである。C. In addition to a and b above, various fibers and various powders are mixed with a bonding agent and used as a lining by spraying or coating on other impermeable substrates, structures, or parts. It is something.
［発明が解決しようとする課題］
上述のように従来の技術で作られる吸音材は、いずれも
他の不通気性の基板や構造物或いは部品にライニングし
て取り付けるものであったため、前記各種素材を加工し
それを取り付ける手間と部品を必要とし、経済的でなか
った。[Problems to be Solved by the Invention] As mentioned above, sound absorbing materials made using conventional techniques are all attached to other impermeable substrates, structures, or parts by lining them. It required labor and parts to process and install it, which was not economical.
また、吹付けたり塗布するものは、特別の装置や作業環
境を備えなくてはならないので、−層不経済である。Furthermore, spraying or coating methods require special equipment and working environments, which is uneconomical.
また、吹付けや塗装する場合以外の吸音材は、複雑な形
状のものは製作が困難になる等の問題があった。Furthermore, sound absorbing materials other than those that are sprayed or painted have problems such as the difficulty of manufacturing them if they have a complicated shape.
この発明によって製造する吸音材は、上記の問題点を解
消するもので、不通気性部分と通気性部分とを一体に具
備するものの製造方法を得ることを目的とする。The sound absorbing material manufactured by the present invention solves the above-mentioned problems, and aims to provide a method for manufacturing a sound absorbing material that integrally includes an impermeable part and a breathable part.
［課題を解決するための手段］
この発明による吸音材の製造方法は、第１の型と第２の
型とで形成される型の空隙に、例えば粒状の熱可塑性プ
ラスチックスを吸音素材として充填し、上記第１の型と
第２の型に所定の温度差を持たせて加圧して加熱するこ
とにより、高温側の型では不通気性のスキン層を成層し
、低温側の型では通気性の多孔質層或いはスキン層を一
体的に形成した吸音材を製造するものである。[Means for Solving the Problems] A method for producing a sound absorbing material according to the present invention includes filling a gap in a mold formed by a first mold and a second mold with, for example, granular thermoplastics as a sound absorbing material. By applying pressure and heating with a predetermined temperature difference between the first mold and the second mold, the high-temperature mold forms an impermeable skin layer, while the low-temperature mold forms an air-permeable skin layer. This method produces a sound absorbing material in which a porous layer or a skin layer is integrally formed.
しかし、吸音素材を加熱して不通気性のスキン層を製造
するには、相当に高温で加熱する必要があり、上記スキ
ン層の厚みを所要の寸法の範囲内にするには、加熱時間
の調節だけでは不十分であるので、この発明による吸音
材の製造方法は、加圧、加熱をするだけでなく強制冷却
をする。However, in order to produce an impermeable skin layer by heating sound absorbing materials, it is necessary to heat the material at a considerably high temperature, and in order to keep the thickness of the skin layer within the required dimension range, the heating time must be increased. Since adjustment alone is not sufficient, the method for producing a sound absorbing material according to the present invention not only pressurizes and heats the material, but also performs forced cooling.
また、通気性の多孔質層やスキ７層を製造するためにも
、上記不通気性のスキン層と同様に加圧、加熱及び冷却
をする。Further, in order to manufacture the breathable porous layer and the gap layer, pressurization, heating, and cooling are performed in the same manner as the above-mentioned impermeable skin layer.
［作 用コ
この発明による吸音材の製造方法は、所定の温度差を持
たせた第１の型と第２の型によって、型内に加圧充填し
た吸音素材を加熱及び冷却することによって、不通気性
のスキン層と通気性の多孔質層やスキン層を確実に、所
要の寸法にして、同時に一体的に製造することができる
。[Function] The method for producing a sound absorbing material according to the present invention involves heating and cooling the sound absorbing material pressurized and filled into the molds using a first mold and a second mold having a predetermined temperature difference. An impermeable skin layer and an air permeable porous layer or skin layer can be reliably made to the required dimensions and simultaneously manufactured integrally.
［実施例］
この発明による吸音材の製造方法の一実施例を、図を参
照しながら説明する。[Example] An example of the method for manufacturing a sound absorbing material according to the present invention will be described with reference to the drawings.
第１図は本発明実施例方法に使用する型の説明図、第２
図に本発明実施例方法で製造された吸音材の断面説明図
、第３図は第２図の拡大説明図である。Figure 1 is an explanatory diagram of the mold used in the method of the embodiment of the present invention;
The figure is an explanatory cross-sectional view of a sound absorbing material manufactured by the method of the embodiment of the present invention, and FIG. 3 is an enlarged explanatory view of FIG. 2.
第１図において、（Ｍ）は本発明実施例方法に使用する
成型用の型である。型（Ｍ）は、雌雄一対で構成される
。（８）は凹形の第１の型、（９）は凸形の第２の型、
（１０）は両型（８）と（９）の間に形成された空隙で
ある。空隙（１０）は適用する装置の吸音効果を高める
ために、予め所定の形状に作られている。また、（１１
）と（２１）はヒータ、（１３）と（１４）は冷却用の
水管である。In FIG. 1, (M) is a mold for molding used in the method of the embodiment of the present invention. Type (M) consists of a male and a female pair. (8) is a concave first type, (9) is a convex second type,
(10) is a gap formed between both molds (8) and (9). The void (10) is previously formed into a predetermined shape in order to enhance the sound absorption effect of the device to which it is applied. Also, (11
) and (21) are heaters, and (13) and (14) are cooling water pipes.
また、第２図及び第３図の（１）は、本発明実施例方法
で製造された吸音材である。（２）は吸音材（１）にお
ける通気性の多孔質層、（３）は通気性のスキン層、（
４）は不通気性のスキン層である。Further, (1) in FIGS. 2 and 3 is a sound absorbing material manufactured by the method of the embodiment of the present invention. (2) is an air permeable porous layer in the sound absorbing material (1), (3) is an air permeable skin layer, (
4) is an impermeable skin layer.
本発明は、第１図に示す型（Ｍ）の空隙（１０）内に、
予め粒状の熱可塑、性プラスチックス（以下、吸音素材
という）を充填する。吸音素材の充填後、第１の型（８
）の温度を、内壁に接触した吸音素材が溶融するような
高い温度に加熱する。同時に、第２の型（９）の温度を
、内壁とその近くにある吸音素材が半溶融状態になるよ
うなやや低めの温度に加熱する。このように空隙（１０
〉内の吸音素材が圧縮加熱されると、高い温度の凹型の
第１の型（８）側の吸音素材は完全に溶融して膜状にな
る。他方、低い温度で加熱された凸型の第２の型（９）
側では、吸音素材が半溶融状態になって圧力によって吸
音素材の粒同志がその接触部分で互いに接合する。In the present invention, in the cavity (10) of the mold (M) shown in FIG.
It is filled with granular thermoplastic or plastics (hereinafter referred to as sound-absorbing material) in advance. After filling the sound absorbing material, the first mold (8
) to a temperature high enough to melt the sound-absorbing material in contact with the inner wall. At the same time, the temperature of the second mold (9) is heated to a slightly lower temperature such that the inner wall and the sound absorbing material near it are in a semi-molten state. In this way, the void (10
When the sound absorbing material inside is compressed and heated, the sound absorbing material on the high temperature first concave mold (8) side is completely melted and becomes a film. On the other hand, a convex second mold (9) heated at a low temperature
On the side, the sound-absorbing material is in a semi-molten state, and the particles of the sound-absorbing material are bonded to each other at their contact areas by pressure.
そして、加圧・加熱を停止すると、第３図に拡大して示
したように、第１の型（８）の接触面に沿って不通気性
のスキン層（４）が成層される。また、第２の型（９）
側では上記スキン層（４〉に達する深さまで、溶けた吸
音素材の粒同志の間に隙間を有する多孔質層（２）が形
成される。この場合、第２の型（９）側の一部の吸音素
材は部分的に膜状のスキン層（３〉になることがあるが
、全体として通気性を損なうことがない。Then, when the pressurization and heating are stopped, an impermeable skin layer (4) is formed along the contact surface of the first mold (8), as shown in an enlarged view in FIG. Also, the second type (9)
On the side, a porous layer (2) having gaps between the particles of the melted sound-absorbing material is formed to a depth reaching the skin layer (4>).In this case, one side of the second mold (9) is formed. Although the sound-absorbing material in this section may partially become a membrane-like skin layer (3), it does not impair breathability as a whole.
このような本発明方法で製造された吸音材（１）が、第
２図に示されている。そして、吸音材（１）における多
孔質層（２）及びスキン層（３）は音源側に対向し、音
源から入射する音のエネルギーを吸収して減衰させる。A sound absorbing material (1) manufactured by such a method of the present invention is shown in FIG. The porous layer (2) and the skin layer (3) in the sound absorbing material (1) face the sound source side, and absorb and attenuate the energy of sound incident from the sound source.
また、スキン層（４）は吸音材よ
（１）を透過し安うとする音を反射して、この部分から
外へ透過する音を遮断する。Further, the skin layer (4) reflects the sound that is transmitted through the sound absorbing material (1) and blocks the sound that is transmitted to the outside from this part.
因みに、吸音素材としてをＡＢＳ樹脂を使用した場合、
第１の型（８）の内壁（１５）の加熱の温度範囲はほぼ
１５０〜２５０℃であり、第２の型（９）の内壁（１６
）の温度は７０〜２３５℃程度とする。By the way, if ABS resin is used as the sound absorbing material,
The temperature range for heating the inner wall (15) of the first mold (8) is approximately 150-250°C, and the inner wall (16) of the second mold (9)
) is about 70 to 235°C.
上述のような型（Ｍ）を使用して吸音素材を加圧加熱し
て成型された吸音材（１）のスキン層（４）の形成は、
加熱温度と加熱時間とによってその厚さが変化する。確
実に所定の厚さのスキン層（４）を得るためには、素早
いスキン層（４）の固化をしなくてはならない。したが
って、第１の型（８）の中に水管（１３〉を通し、ヒー
タ（１１）への給電を停止すると共に、水管（１３）へ
冷水を通水して冷却するようにする。The formation of the skin layer (4) of the sound absorbing material (1), which is molded by pressurizing and heating the sound absorbing material using the mold (M) as described above, is as follows:
The thickness changes depending on the heating temperature and heating time. In order to reliably obtain a skin layer (4) of a predetermined thickness, the skin layer (4) must be solidified quickly. Therefore, a water pipe (13>) is passed through the first mold (8), power supply to the heater (11) is stopped, and cold water is passed through the water pipe (13) for cooling.
第２の型（９）においても同様に加圧、加熱と冷却をし
て、所要の通気性を有する多孔質層（２〉を生成させる
ものである。The second mold (9) is similarly pressurized, heated and cooled to produce a porous layer (2) having the required air permeability.
第４図は第１の型で製造して吸音材（１）を電気掃除機
（５）の吸音に利用した場合の、適用例の説明図である
。FIG. 4 is an explanatory diagram of an application example in which the sound absorbing material (1) produced by the first type is used for sound absorption in a vacuum cleaner (5).
第４図の（５）は電気掃除機、（８）は外ケース、（７
）はブロワモータである。矢印は、排気の流れを示す。In Figure 4, (5) is a vacuum cleaner, (8) is an outer case, and (7) is a vacuum cleaner.
) is the blower motor. Arrows indicate exhaust flow.
図示のように、本発明で作られた吸音材（１）が電気掃
除機（５）の内部に取付けられたブロワ−モータ（７）
の排気側を覆うように設けられている。そして、不通気
性のスキン層（４）が外側になり、通気性の多孔質層（
２）或いはスキン層（３）がブロワ−モータ（７）側に
なっている。この結果、ブロワ−モータ（７）から発生
する騒音は、吸音材（１）によって多孔質層（２）で減
衰され、スキン層（４）で遮断される。As shown in the figure, a blower motor (7) in which a sound absorbing material (1) made according to the present invention is installed inside a vacuum cleaner (5).
It is provided to cover the exhaust side of the Then, the impermeable skin layer (4) is on the outside and the breathable porous layer (4) is on the outside.
2) Alternatively, the skin layer (3) is on the blower motor (7) side. As a result, the noise generated from the blower motor (7) is attenuated by the sound absorbing material (1) at the porous layer (2) and blocked by the skin layer (4).
なお、上述の実施例では第１の型（８）と第２の型（９
）とを直接接触させた場合を例示して説明したが、これ
らの間に断熱材を介在させるように構成してもよい。断
熱材を介在させれば、両型（８）と（９）の温度差の温
度制御を効果的に行うことができる。In addition, in the above-mentioned embodiment, the first mold (8) and the second mold (9)
) are in direct contact with each other, but a heat insulating material may be interposed between them. By interposing a heat insulating material, the temperature difference between the molds (8) and (9) can be effectively controlled.
［発明の効果］
以上説明したように、この発明によれば、所定の温度に
した第１の型と第２の型とでその内に吸音材に相応する
空隙を作り、ここに充填した吸音素材を加圧、加熱する
ことによって不通気性のスキン層を一体的に同時に成型
することができる。[Effects of the Invention] As explained above, according to the present invention, a void corresponding to the sound absorbing material is created in the first mold and the second mold heated to a predetermined temperature, and the sound absorbing material is filled in the void. By pressurizing and heating the material, the impermeable skin layer can be simultaneously molded into one piece.
しかも、加熱をとめると同時に冷却することによって、
不通気性のスキン層及び通気性の多孔質層或いはスキン
層を確実に作り、その層の厚みを正確に所要の寸法にす
ると共に、上記各層の接合が強固で、堅牢な構造の吸音
材をつくるものである。Moreover, by stopping heating and cooling at the same time,
It is necessary to reliably create an impermeable skin layer and a permeable porous layer or skin layer, adjust the thickness of the layers to the required dimensions accurately, and use a sound absorbing material that has a strong structure and strong bonding between the above layers. It is something that is created.
こうして製造した吸音材は、不通気性のスキン層を露出
して、機体の構造材として使用することもできるもので
あって、吸音材として優れた性能ばかりでなく、部品点
数の削減、組立て工数の低減等、その利用価値は極めて
大である。The sound absorbing material manufactured in this way can be used as a structural material for the aircraft body by exposing the impermeable skin layer, and it not only has excellent performance as a sound absorbing material, but also reduces the number of parts and assembly man-hours. Its utility value, such as the reduction of
したがって、吸音材として優れた吸音効果を有すると同
時に、その性能を均一化する基礎である製造品質の安全
が得られるものである。Therefore, it has an excellent sound absorbing effect as a sound absorbing material, and at the same time, it can provide safe manufacturing quality, which is the basis for making the performance uniform.
第１図は本発明実施例方法に使用する型の説明図、第２
図に本発明実施例方法で製造された吸音材の断面説明図
、第３図は第２図の拡大説明図、第４図は実施例で製造
した吸音材の適用例の説明図である。
図において、（１）は吸音材、（２〉は多孔質層、（３
）と（４）はスキン層、（８）は雌型（第１の型）、（
９）は雄型（第２の型） （１０）は空隙、（１１）
、（１２）はヒータ、（１３）、（１４）は水管、（Ｍ
）は第１の型（８）と（９）からなる型である。Figure 1 is an explanatory diagram of the mold used in the method of the embodiment of the present invention;
3 is an enlarged explanatory view of FIG. 2, and FIG. 4 is an explanatory view of an application example of the sound absorbing material manufactured in the example. In the figure, (1) is a sound absorbing material, (2> is a porous layer, and (3) is a porous layer.
) and (4) are the skin layer, (8) is the female type (first type), (
9) is the male type (second type) (10) is the void, (11)
, (12) is a heater, (13), (14) are water pipes, (M
) is a type consisting of the first type (8) and (9).
Claims (2)
加熱圧縮して吸音材を製造する方法において、上記吸音
素材として粒状で熱可塑性の吸音素材を用い、一方の型
の温度を上記吸音素材が溶融する高さとし、他方の型の
温度を上記吸音素材が半溶融状態になる高さとしたこと
を特徴とする吸音材の製造方法。(1) In a method of manufacturing a sound absorbing material by filling a sound absorbing material into a gap formed by two molds and then heating and compressing the material, a granular thermoplastic sound absorbing material is used as the sound absorbing material, and the temperature of one mold is A method for producing a sound absorbing material, characterized in that the temperature of the other mold is set to a height at which the sound absorbing material melts, and the temperature of the other mold is set to a height at which the sound absorbing material becomes semi-molten.
する請求項（１）記載の吸音材の製造方法。(2) The method for manufacturing a sound absorbing material according to claim (1), wherein the two molds are rapidly cooled after being heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19822889A JPH0365036A (en) | 1989-07-31 | 1989-07-31 | Fabrication of acoustic member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19822889A JPH0365036A (en) | 1989-07-31 | 1989-07-31 | Fabrication of acoustic member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0365036A true JPH0365036A (en) | 1991-03-20 |
Family
ID=16387639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19822889A Pending JPH0365036A (en) | 1989-07-31 | 1989-07-31 | Fabrication of acoustic member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0365036A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5945134A (en) * | 1982-09-09 | 1984-03-13 | Honda Motor Co Ltd | Manufacture of resin molding |
-
1989
- 1989-07-31 JP JP19822889A patent/JPH0365036A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5945134A (en) * | 1982-09-09 | 1984-03-13 | Honda Motor Co Ltd | Manufacture of resin molding |
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