JP2005031463A - Sound insulating material - Google Patents

Sound insulating material Download PDF

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JP2005031463A
JP2005031463A JP2003271412A JP2003271412A JP2005031463A JP 2005031463 A JP2005031463 A JP 2005031463A JP 2003271412 A JP2003271412 A JP 2003271412A JP 2003271412 A JP2003271412 A JP 2003271412A JP 2005031463 A JP2005031463 A JP 2005031463A
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metal piece
aluminum
metal
metal pieces
aluminum alloy
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JP4122267B2 (en
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Akira Watanabe
暁 渡辺
Ken Takeuchi
憲 竹内
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WATANABE SHOJI KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a porous sound insulating material with superior lightweight property which is formed by compressing and forming the metal pieces of aluminum or aluminum alloy in specified shapes and entwining the metal pieces with one another. <P>SOLUTION: The porous sound insulating material is formed by depositing, and compressing and forming metal pieces of aluminum or aluminum alloy which are 2 to 3 mm wide, 3 to 20 mm long, and 0.05 to 0.16 mm thick into a plate to entwine the metal pieces with one another, so that the vibration energy of a sound can be converted into heat energy by vibrations of the metal pieces of the sound insulating material to absorb the sound, thereby displaying superior sound insulating performance. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、アルミニウム金属片又はアルミニウム合金の金属片を堆積させて板状に圧縮成形して金属片を互いに交絡させてなる多孔質状の防音材に関する。   The present invention relates to a porous soundproof material in which aluminum metal pieces or aluminum alloy metal pieces are deposited and compression-formed into a plate shape so that the metal pieces are entangled with each other.

従来から、アルミニウム材料を所望形状に切断するにあたっては回転鋸が汎用されてきた。そして、この回転鋸を用いてアルミニウム材料を切削する際に切削屑（切り粉）が多量に発生する。   Conventionally, a rotary saw has been widely used for cutting an aluminum material into a desired shape. And when cutting an aluminum material using this rotary saw, a large amount of cutting waste (swarf) is generated.

そして、この多量の切削屑の処理が問題となっており、このような切削屑の処理方法として、特許文献１には、アルミニウム切削屑を非酸化性雰囲気中、所定温度及び所定圧力を加えながらホットプレスするアルミニウム切削屑の処理方法が提案されているが、上述のように、アルミニウム切削屑を所定温度及び所定圧力でホットプレスする必要があり、簡単にアルミニウム切削屑を再利用することができないかといった要望があった。   And processing of this large amount of cutting waste has been a problem. As a processing method for such cutting waste, Patent Document 1 discloses that while applying predetermined temperature and predetermined pressure to aluminum cutting waste in a non-oxidizing atmosphere. A method for processing hot-cut aluminum chips has been proposed, but as described above, it is necessary to hot-press aluminum chips at a predetermined temperature and pressure, and the aluminum chips cannot be easily reused. There was a request.

又、従来から防音のための防音パネルが広く用いられ、このような防音パネルとして、コンクリート板や金属板を利用したものが多数、提供されているものの、コンクリート板や金属板を利用した防音パネルは重量が重く、一般家屋には用いることができないと共に運搬にもコストが掛かるといった問題点を有した。   In addition, soundproof panels for soundproofing have been widely used in the past, and many such soundproof panels using concrete plates or metal plates are provided, but soundproof panels using concrete plates or metal plates are provided. Has a problem that it is heavy and cannot be used in ordinary houses, and it is also expensive to transport.

特開平１０−８１９２１号公報Japanese Patent Laid-Open No. 10-81921

本発明は、所定形態を有するアルミニウム金属片又はアルミニウム合金の金属片を圧縮成形して金属片を互いに交絡させてなる軽量性に優れた多孔質状の防音材を提供する。   The present invention provides a porous soundproof material excellent in light weight obtained by compression-molding a metal piece of an aluminum metal piece or an aluminum alloy having a predetermined form and interlacing the metal pieces.

請求項１に記載の多孔質状の防音材は、幅２〜３ｍｍ、長さ３〜２０ｍｍ、厚み０．０５〜０．１６ｍｍのアルミニウム金属片又はアルミニウム合金の金属片を堆積させて板状に圧縮成形して金属片を互いに交絡させてなる。   The porous soundproof material according to claim 1 is formed by depositing an aluminum metal piece or an aluminum alloy metal piece having a width of 2 to 3 mm, a length of 3 to 20 mm, and a thickness of 0.05 to 0.16 mm. The metal pieces are entangled with each other by compression molding.

又、請求項２に記載の多孔質状の防音材は、請求項１に記載の多孔質状の防音材において、アルミニウム金属片又はアルミニウム合金の金属片は、アルミニウム成形体又はアルミニウム合金の成形体を回転鋸によって切削加工した時に発生する切削屑であることを特徴とする。   The porous soundproof material according to claim 2 is the porous soundproof material according to claim 1, wherein the aluminum metal piece or the aluminum alloy metal piece is an aluminum formed body or an aluminum alloy formed body. It is the cutting waste generated when it is cut with a rotary saw.

請求項１に記載の多孔質状の防音材は、幅２〜３ｍｍ、長さ３〜２０ｍｍ、厚み０．０５〜０．１６ｍｍのアルミニウム金属片又はアルミニウム合金の金属片を堆積させて板状に圧縮成形して金属片を互いに交絡させてなるので、音の振動エネルギーを防音材の金属片の振動によって熱エネルギーに変換して吸音することができ優れた防音性能を発揮する。そして、この防音材は、多孔質状の防音材であると共に、他の金属に比較して比重の比較的軽いアルミニウム又はアルミニウム合金から形成されていることから軽量性に優れており、従来のコンクリート製の防音材と異なって建築物の所望箇所に好適に用いることができる。   The porous soundproof material according to claim 1 is formed by depositing an aluminum metal piece or an aluminum alloy metal piece having a width of 2 to 3 mm, a length of 3 to 20 mm, and a thickness of 0.05 to 0.16 mm. Since the metal pieces are entangled with each other by compression molding, the sound vibration energy can be converted into heat energy by the vibration of the metal pieces of the soundproof material to absorb the sound, and excellent soundproof performance is exhibited. This soundproofing material is a porous soundproofing material, and is made of aluminum or an aluminum alloy having a relatively low specific gravity compared to other metals, so that it is excellent in lightness, and is a conventional concrete. Unlike a soundproofing material made of metal, it can be suitably used for a desired location of a building.

更に、防音材は、アルミニウム又はアルミニウム合金から形成されていることから、耐蝕性に優れており、優れた防音性を長期間に亘って継続して発揮することができる。   Furthermore, since the soundproofing material is formed from aluminum or an aluminum alloy, the soundproofing material is excellent in corrosion resistance, and can exhibit excellent soundproofing properties over a long period of time.

又、請求項２に記載の多孔質状の防音材は、請求項１に記載の多孔質状の防音材において、アルミニウム金属片又はアルミニウム合金の金属片は、アルミニウム成形体又はアルミニウム合金の成形体を回転鋸によって切削加工した時に発生する切削屑であることを特徴とするので、切削屑を有効利用することができアルミニウム又はアルミニウム合金の再利用を図って地球環境の保全に供することができる。   The porous soundproof material according to claim 2 is the porous soundproof material according to claim 1, wherein the aluminum metal piece or the aluminum alloy metal piece is an aluminum formed body or an aluminum alloy formed body. Therefore, the cutting waste can be used effectively, and aluminum or aluminum alloy can be reused for the preservation of the global environment.

本発明の多硬質状の防音材の一例を図面を参照しつつ説明する。多孔質状の防音材Ａは、図１に示したように、幅２〜３ｍｍ、長さ３〜２０ｍｍ、厚み０．０５〜０．１６ｍｍのアルミニウム金属片又はアルミニウム合金の金属片を堆積させて板状に圧縮成形して金属片を互いに交絡させてなる。   An example of the multi-hard soundproof material of the present invention will be described with reference to the drawings. As shown in FIG. 1, the porous soundproofing material A is formed by depositing an aluminum metal piece or an aluminum alloy metal piece having a width of 2 to 3 mm, a length of 3 to 20 mm, and a thickness of 0.05 to 0.16 mm. The metal pieces are entangled with each other by compression molding into a plate shape.

上記金属片１はアルミニウム又はアルミニウム合金からなる。この金属片１を構成するアルミニウムとしては、ＪＩＳ Ａ１０５０が好ましく用いられる。又、上記金属片１を構成するアルミニウム合金としては、特に限定されず、例えば、ＪＩＳ Ａ５０５２、Ａ５０８３、Ａ２０１７、Ａ７０７５系のアルミニウム合金が挙げられ、耐圧縮成形性及び耐蝕性の点から、ＪＩＳ Ａ５０５２系のアルミニウム合金が好ましい。   The metal piece 1 is made of aluminum or an aluminum alloy. As aluminum which comprises this metal piece 1, JIS A1050 is used preferably. Moreover, it does not specifically limit as an aluminum alloy which comprises the said metal piece 1, For example, JIS A5052, A5083, A2017, A7075 type | system | group aluminum alloy is mentioned, JIS A5052 from the point of compression-molding resistance and corrosion resistance. A series aluminum alloy is preferred.

そして、上記金属片１の形態としては、金属片１を堆積させて板状に圧縮成形した際に金属片１同士が互いに交絡して一体化することができれば、特に限定されず、例えば、直線状、螺線状（図２及び図３）の他に、不規則な方向に屈曲しているもの（図４）あってもよいが、金属片１同士が強固に交絡することができる点で、螺線状が好ましい。なお、螺線状とは、(1) 図２のように、軸の周りを円運動しながら軸方向に移動する点の描く空間曲線状の他に、(2) 図３のように、渦巻き状にぐるぐるまわった平面曲線状も含むが、上記防音材Ａに用いられる金属片１の形態としては、図２のように、軸の周りを円運動しながら軸方向に移動する点の描く空間曲線状が好ましい。   The form of the metal piece 1 is not particularly limited as long as the metal pieces 1 can be entangled and integrated with each other when the metal pieces 1 are deposited and compression-molded into a plate shape. In addition to the shape and the spiral shape (FIGS. 2 and 3), there may be an irregularly bent shape (FIG. 4), but the metal pieces 1 can be firmly entangled with each other. A spiral shape is preferred. In addition, the spiral shape is (1) In addition to a spatial curve drawn by a point moving in the axial direction while circularly moving around an axis as shown in FIG. 2, (2) As shown in FIG. The shape of the metal piece 1 used for the soundproofing material A includes a space drawn by a point moving in the axial direction while circularly moving around the axis as shown in FIG. A curved shape is preferred.

更に、上記金属片１として、螺線状の金属片の他に、直線状の金属片や不規則な方向に屈曲してなる金属片を混合して用いる場合には、螺線状の金属片が金属片中、６０重量％以上含有されていることが好ましく、８０重量％以上含有されていることがより好ましい。   Furthermore, when the metal piece 1 is used in combination with a spiral metal piece, a straight metal piece or a metal piece bent in an irregular direction, a spiral metal piece. Is preferably contained in the metal piece in an amount of 60% by weight or more, more preferably 80% by weight or more.

これは、金属片中における螺線状の金属片の含有量が少ないと、金属片同士を圧縮成形によって所定形状を維持できる程度に交絡一体化させることができないことがあるからである。   This is because if the content of the spiral metal piece in the metal piece is small, the metal pieces may not be entangled and integrated to such an extent that the predetermined shape can be maintained by compression molding.

具体的には、上記金属片１の幅は、狭いと、金属片同士を圧縮成形によって所定形状に維持できる程度に交絡一体化させることができない一方、広いと、多孔質状の防音材の空隙率が低くなり過ぎて防音材の防音性が低下するので、２〜３ｍｍに限定され、２．５〜２．８ｍｍがより好ましい。ここで、金属片１の幅が一定幅でない場合には、金属片１における最大幅と最小幅の相加平均をいう。   Specifically, if the width of the metal piece 1 is narrow, the metal pieces cannot be entangled and integrated to such an extent that the metal pieces can be maintained in a predetermined shape by compression molding. Since the rate becomes too low and the soundproofing property of the soundproofing material decreases, it is limited to 2 to 3 mm, more preferably 2.5 to 2.8 mm. Here, when the width | variety of the metal piece 1 is not fixed width, it says the arithmetic mean of the maximum width in the metal piece 1, and the minimum width.

又、上記金属片１の長さは、長いと、多孔質状の防音材の空隙率が低くなり過ぎて防音材の防音性が低下する一方、短いと、金属片同士を圧縮成形によって所定形状に維持できる程度に交絡一体化させることができないので、３〜２０ｍｍに限定され、５〜１２ｍｍがより好ましい。   On the other hand, if the length of the metal piece 1 is long, the porosity of the porous soundproofing material becomes too low and the soundproofing property of the soundproofing material is reduced. On the other hand, if the length is short, the metal pieces 1 are formed into a predetermined shape by compression molding. Therefore, it is limited to 3 to 20 mm, and more preferably 5 to 12 mm.

更に、上記金属片１の厚みは、薄いと、金属片が圧縮成形の過程で破断してしまって、金属片同士を所定形状に維持できる程度に交絡一体化させることができない一方、厚いと、金属片を変形させることができず、金属片同士を圧縮成形によって所定形状に維持できる程度に交絡一体化させることができないので、０．０５〜０．１６ｍｍに限定され、０．０７〜０．１５ｍｍが好ましい。なお、金属片の厚みとは、金属片における最も厚い部分の厚さと最も薄い部分の厚さの相加平均をいう。   Furthermore, if the thickness of the metal piece 1 is thin, the metal piece is broken in the process of compression molding, and the metal pieces cannot be entangled and integrated to such an extent that the metal pieces can be maintained in a predetermined shape. Since the metal pieces cannot be deformed and cannot be entangled and integrated to such an extent that the metal pieces can be maintained in a predetermined shape by compression molding, the metal pieces are limited to 0.05 to 0.16 mm, and are 0.07 to 0.00. 15 mm is preferred. In addition, the thickness of a metal piece means the arithmetic mean of the thickness of the thickest part in the metal piece, and the thickness of the thinnest part.

なお、金属片１の長さとは、金属片１における幅方向の両端縁のうちの長い方の端縁の全長をいい、金属片１の幅とは、金属片１における幅方向の両端縁のうちの長い方の端縁に対して直交する方向の長さをいい、金属片１の厚みとは、金属片１の表面に対して直交する方向をいう。   The length of the metal piece 1 refers to the entire length of the longer edge of the widthwise ends of the metal piece 1. The width of the metal piece 1 refers to the width of both edges of the metal piece 1 in the width direction. The length in a direction perpendicular to the longer edge of the metal piece 1 is referred to, and the thickness of the metal piece 1 refers to a direction perpendicular to the surface of the metal piece 1.

又、上記金属片１には、上記幅（２〜３ｍｍ）、長さ（３〜２０ｍｍ）及び厚み（０．０５〜０．１６ｍｍ）範囲を外れる寸法を有する金属片が混入していてもよいが、上記幅、長さ及び厚み範囲を外れる寸法を有する金属片は金属片中、４０重量％以下となるように調整することが好ましく、３０重量％以下となるように調整することがより好ましく、２０重量％以下となるように調整するのが特に好ましい。   Moreover, the metal piece 1 may be mixed with a metal piece having dimensions outside the range of the width (2 to 3 mm), length (3 to 20 mm), and thickness (0.05 to 0.16 mm). However, it is preferable to adjust the metal piece having dimensions out of the width, length, and thickness range to 40% by weight or less in the metal piece, and more preferably to adjust to 30% by weight or less. It is particularly preferable to adjust the content to 20% by weight or less.

そして、上記多孔質状の防音材Ａの空隙率は、低いと、防音材の防音性が低下することがある一方、高いと、防音材Ａの機械的強度が低下することがあるので、７０〜９５％が好ましく、７５〜９０％がより好ましい。   When the porosity of the porous soundproofing material A is low, the soundproofing property of the soundproofing material may be lowered. On the other hand, when the porosity is high, the mechanical strength of the soundproofing material A may be lowered. -95% is preferable and 75-90% is more preferable.

ここで、防音材Ａの空隙率は下記の要領で測定されたものをいう。即ち、防音材Ａの見掛け体積を測定し、この見掛け体積に防音材を形成している金属片の比重Ｇを乗じたものをＷ0 とする。 Here, the porosity of the soundproofing material A is measured in the following manner. That is, the apparent volume of the soundproofing material A is measured, and this apparent volume multiplied by the specific gravity G of the metal piece forming the soundproofing material is defined as W 0 .

なお、金属片が複数種類のアルミニウム又はアルミニウム合金の金属片の混合物であったり或いは別の種類の金属からなる金属片が混入している場合には、金属片の比重Ｇとしては、各金属片を構成している金属の比重Ｇｎにこの金属からなる金属片の防音材Ａ中における総含有率Ｃｎを乗じたものの和をいう（式１参照）。
金属片の比重Ｇ＝Ｇ1 ×Ｃ1 ＋Ｇ2 ×Ｃ2 ＋・・・＋Ｇｎ×Ｃｎ・・・式１ In addition, when the metal piece is a mixture of a plurality of types of aluminum or aluminum alloy metal pieces, or a metal piece made of another type of metal is mixed, the specific gravity G of the metal piece is determined as each metal piece. Is the sum of the metal specific gravity Gn multiplied by the total content Cn in the soundproofing material A of the metal piece made of this metal (see Formula 1).
Specific gravity of metal piece G = G 1 × C 1 + G 2 × C 2 +... + Gn × Cn.

次に、防音材Ａの総重量Ｗ1 を測定して下記式２に基づいて防音材Ａの空隙率を算出する。
防音材Ａの空隙率（％）＝１００×（１−Ｗ1 ／Ｗ0 ）・・・式２ Next, the total weight W 1 of the soundproof material A is measured, and the porosity of the soundproof material A is calculated based on the following formula 2.
Void ratio (%) of soundproof material A = 100 × (1−W 1 / W 0 ) Equation 2

但し、所定金属からなる金属片の防音材Ａ中における総含有率は下記式３に基づいて算出されたものをいう。なお、Ｗ2 は、防音材Ａ中における所定金属からなる金属片の総重量をいう。
所定金属からなる金属片の防音材Ａ中における含有率Ｃｎ＝Ｗ2 ／Ｗ1 ・・・式３ However, the total content rate in the soundproofing material A of the metal piece which consists of predetermined metals says what was computed based on following formula 3. W 2 refers to the total weight of metal pieces made of a predetermined metal in the soundproof material A.
Content ratio Cn = W 2 / W 1 in the soundproof material A of a metal piece made of a predetermined metal Formula 3

例えば、防音材Ａがアルミニウム合金の金属片（比重：２．６８、総含有率：０．８）とアルミニウム合金の金属片（比重：２．６６、総含有率：０．２）とからなる場合には、金属片の比重Ｇは下記要領で算出される。
金属片の比重Ｇ＝２．６８×０．８＋２．６６×０．２
＝２．６７６ For example, the soundproofing material A is made of aluminum alloy metal pieces (specific gravity: 2.68, total content: 0.8) and aluminum alloy metal pieces (specific gravity: 2.66, total content: 0.2). In this case, the specific gravity G of the metal piece is calculated as follows.
Specific gravity G of metal piece = 2.68 × 0.8 + 2.66 × 0.2
= 2.676

又、防音材Ａの厚みは、薄いと、防音材Ａの防音性が低下することがある一方、厚くても、防音材Ａの防音性がそれ程向上しないと共に防音材Ａの軽量性が低下することから、１０〜１５ｍｍが好ましく、１２〜１４ｍｍがより好ましい。   On the other hand, if the thickness of the soundproofing material A is thin, the soundproofing property of the soundproofing material A may be deteriorated. Therefore, 10 to 15 mm is preferable, and 12 to 14 mm is more preferable.

続いて、上記防音材Ａの製造方法について説明する。この防音材Ａを構成している金属片としては上述の幅、長さ、厚みを有するアルミニウム金属片又はアルミニウム合金の金属片であれば、特に限定されるものではないが、リサイクル性の観点から、図５に示したように、アルミニウム成形体又はアルミニウム合金の成形体Ｂ、例えば、アルミニウム或いはアルミニウム合金からなる板状体或いは棒状体Ｂを、回転鋸Ｄによって切削加工した時に発生する、上記所定幅、長さ、厚みを有する切削屑（切り粉）を金属片として利用するのが好ましい。   Then, the manufacturing method of the said soundproof material A is demonstrated. The metal piece constituting the soundproofing material A is not particularly limited as long as it is an aluminum metal piece or an aluminum alloy metal piece having the above-described width, length, and thickness, but from the viewpoint of recyclability. As shown in FIG. 5, the above-mentioned predetermined condition that occurs when an aluminum molded body or an aluminum alloy molded body B, for example, a plate or rod-shaped body B made of aluminum or aluminum alloy, is cut by a rotary saw D. It is preferable to use cutting waste (swarf) having a width, a length and a thickness as a metal piece.

上述した所定幅、長さ、厚みを有する金属片１を得る具体的な要領の一つとしては、山本機械産業株式会社から市販されている回転鋸（商品名「ＹＴＲ−７６０ＡＮ」）を用いてアルミニウム成形体又はアルミニウム合金の成形体Ｂを回転鋸の回転速度を１４００〜１５００ｒｐｍ、６０〜１００ｍｍ／分の速度で成形体Ｂに接近させつつ切削加工した際に生じる切削屑（切り粉）を金属片１として利用することができる。   As one of the specific points for obtaining the metal piece 1 having the predetermined width, length and thickness described above, a rotary saw (trade name “YTR-760AN”) commercially available from Yamamoto Machine Industry Co., Ltd. is used. Metal cutting waste generated when cutting an aluminum compact or aluminum alloy compact B while approaching the compact B at a rotational speed of 1400-1500 rpm and 60-100 mm / min. It can be used as a piece 1.

そして、図６に示したように、アルミニム成形体又はアルミニウム合金の成形体Ｂを回転鋸Ｄによって切削加工した時に発生する多量の切削屑（金属片１）を、上端が全面的に開口21してなる成形枠２内に堆積させた後、上記成形枠２の上端開口部21の平面形状に合致した平面大きさ及び平面形状を有する押圧部材３を用いて成形枠２内の堆積状態の多数の金属片１を上下方向から圧縮して金属片１を変形させつつ互いに交絡一体化させて板状に成形して多孔質状の防音材Ａを製造することができる。なお、上記押圧部材３は、製造しようとする防音材Ａの厚み未満に金属片１を上下方向に圧縮しないように規制されている。   Then, as shown in FIG. 6, a large amount of cutting waste (metal piece 1) generated when the aluminum compact or aluminum alloy compact B is machined by the rotary saw D is opened over the entire upper end 21. After being deposited in the forming frame 2, a large number of accumulated states in the forming frame 2 using the pressing members 3 having a planar size and a planar shape that match the planar shape of the upper end opening 21 of the molding frame 2. The metal piece 1 can be compressed from above and below to be entangled and integrated with each other while deforming the metal piece 1 to form a plate-like soundproofing material A. The pressing member 3 is regulated so as not to compress the metal piece 1 in the vertical direction below the thickness of the soundproofing material A to be manufactured.

この成形枠２内に堆積させた金属片１を上下方向に圧縮する際の押圧力、即ち、金属片を圧縮成形させる際における成形圧力は、小さいと、多数の金属片を変形させつつ互いに交絡一体化させることができないことがある一方、高いと、金属片が破断したり或いは得られる防音材の空隙率が低下して防音材の防音性が低下することがあるので、７．８×１０9 〜１０．８×１０9 Ｐａが好ましく、８．８×１０9 〜９．８×１０9 Ｐａがより好ましい。 If the pressing force for compressing the metal piece 1 deposited in the forming frame 2 in the vertical direction, that is, the forming pressure for compressing the metal piece, is small, the metal pieces 1 are entangled with each other while deforming many metal pieces. On the other hand, if it is impossible to integrate, if it is high, the metal piece may be broken or the porosity of the obtained soundproofing material may be lowered, so that the soundproofing property of the soundproofing material may be lowered. 9 to 10.8 × 10 9 Pa is preferable, and 8.8 × 10 9 to 9.8 × 10 9 Pa is more preferable.

又、成形枠２内に堆積させた金属片１に上下方向に圧縮力を加える時間、即ち、金属片１の圧縮成形時間は、短いと、金属片を変形させつつ互いに充分に交絡一体化させることができないことがある一方、長いと、金属片が破断したり或いは防音材の空隙率が低下して防音材の防音性が低下することがあるので、１〜５秒が好ましく、１〜２秒がより好ましい。   Further, if the time for applying a compressive force in the vertical direction to the metal pieces 1 deposited in the forming frame 2, that is, the compression forming time of the metal pieces 1, is short, the metal pieces are sufficiently entangled with each other while being deformed. On the other hand, if the length is too long, the metal piece may be broken or the porosity of the soundproofing material may be lowered to lower the soundproofing property of the soundproofing material. Seconds are more preferred.

このようにして得られた防音材Ａは、多数の金属片１、１・・・が互いに不規則に交絡一体化して形成されており、金属片１、１間には空隙が多数、形成されて多孔質状とされていると共に、各金属片１は振動することによって音の振動エネルギーを熱エネルギーに変換して音を円滑に吸収することができる。   The soundproofing material A obtained in this way is formed by irregularly intermingling and integrating a large number of metal pieces 1, 1... Each metal piece 1 can vibrate and convert sound vibration energy into heat energy to absorb sound smoothly.

しかも、上記防音材Ａは、多孔質状に形成されていると共に、アルミニウム又はアルミニウム合金から形成されていることから、軽量性に優れており、各種建築物に幅広く用いることができる。   And since the said sound-insulating material A is formed from the porous form and aluminum or aluminum alloy, it is excellent in lightweight property and can be widely used for various buildings.

そして、上記防音材Ａは、保形性の観点から、収納部材４に充填、収納された上で用いられる。具体的には、上記収納部材４は、図８に示したように、側面矩形状の両側部材41、42とこの両側部材41、42の対向する四方周縁部同士を連結する四角枠状の周壁部材43とから直方体状に形成されてなり、両側部材41、42と周壁部材43とで囲まれた部分には直方体状の防音材収納空間部40が形成されている。   The soundproofing material A is used after being filled and stored in the storage member 4 from the viewpoint of shape retention. Specifically, as shown in FIG. 8, the storage member 4 is a rectangular frame-shaped peripheral wall that connects both side members 41, 42 having a rectangular side surface and the opposing four-side peripheral portions of the side members 41, 42. The member 43 is formed in a rectangular parallelepiped shape, and a rectangular parallelepiped soundproof material storage space 40 is formed in a portion surrounded by the side members 41 and 42 and the peripheral wall member 43.

なお、上記収納部材４の両側部材41、42及び周壁部材43は、所定厚みを有する矩形状の板材或いはこれら板材を組み合わせて形成されるが、このような板材としては、特に限定されず、例えば、木板、鉄板、ステンレス板、石板、銅板などが挙げられ、取り扱い性及び軽量性の観点から木板が好ましい。   The side members 41 and 42 and the peripheral wall member 43 of the storage member 4 are formed of a rectangular plate material having a predetermined thickness or a combination of these plate materials, but such a plate material is not particularly limited. , Wood plate, iron plate, stainless steel plate, stone plate, copper plate and the like, and wood plate is preferred from the viewpoint of handling and light weight.

このように形成された収納部材４の防音材収納空間部40内に一個或いは複数個の防音材Ａを隙間なく充填して防音材収納空間部40を閉止した上で、図９に示したように、建築物Ｅ、例えば、防音室Ｅの内外壁間に形成された空間部内に、防音材Ａを収納した複数個の収納部材４、４・・・を互いに隣接する収納部材４、４間に隙間が生じないように密接させた状態で隙間なく配設されて用いられる。   As shown in FIG. 9, the soundproofing material storage space 40 of the storage member 4 formed in this way is filled with one or a plurality of soundproofing materials A without any gaps, and the soundproofing material storage space 40 is closed. In addition, a plurality of storage members 4, 4... Storing the soundproof material A in a space formed between the inner and outer walls of the building E, for example, the soundproof room E, between the storage members 4, 4 adjacent to each other. Are used in a state where they are in close contact so that no gap is formed.

そして、防音室Ｅ内の音源から発生した音は振動エネルギーとなって防音室Ｅの内壁を通じて収納部材４内の防音材Ａ内に入射するが、この防音材Ａ内に入射した振動エネルギーは、防音材Ａを構成する金属片１が振動することによって熱エネルギーに変換されて円滑に吸収され、音は防音室Ｅ外には殆ど漏れることはない。   And the sound generated from the sound source in the soundproof room E becomes vibrational energy and enters the soundproofing material A in the storage member 4 through the inner wall of the soundproofing room E. The vibrational energy incident in the soundproofing material A is When the metal piece 1 constituting the soundproofing material A vibrates, it is converted into heat energy and smoothly absorbed, and the sound hardly leaks outside the soundproofing room E.

本発明の防音材を示した斜視図である。It is the perspective view which showed the soundproof material of this invention. 金属片の一例を示した斜視図である。It is the perspective view which showed an example of the metal piece. 金属片の一例を示した斜視図である。It is the perspective view which showed an example of the metal piece. 金属片の一例を示した斜視図である。It is the perspective view which showed an example of the metal piece. アルミニウム成形体又はアルミニウム合金の成形体を回転鋸を用いて切削加工している状態を示した模式図である。It is the schematic diagram which showed the state which is cutting the aluminum molded object or the aluminum alloy molded object using the rotary saw. 金属片を圧縮成形する要領を示した模式図である。It is the schematic diagram which showed the point which compresses and forms a metal piece. 金属片を圧縮成形する要領を示した模式図である。It is the schematic diagram which showed the point which compresses and forms a metal piece. 防音材を収納部材内に収納した状態を示した縦断面図である。It is the longitudinal cross-sectional view which showed the state which accommodated the soundproof material in the storage member. 防音材が収納された収納部材を用いて構築された防音室を示した斜視図である。It is the perspective view which showed the soundproof room constructed | assembled using the storage member in which the soundproof material was accommodated.

符号の説明Explanation of symbols

１ 金属片
Ａ 防音材
Ｂ アルミニウム成形体又はアルミニウム合金の成形体
Ｄ 回転鋸 1 Metal piece A Soundproof material B Aluminum molded body or aluminum alloy molded body D Rotary saw

Claims (2)

幅２〜３ｍｍ、長さ３〜２０ｍｍ、厚み０．０５〜０．１６ｍｍのアルミニウム金属片又はアルミニウム合金の金属片を堆積させて板状に圧縮成形して金属片を互いに交絡させてなる多孔質状の防音材。 Porous formed by depositing aluminum metal pieces or aluminum alloy metal pieces having a width of 2 to 3 mm, a length of 3 to 20 mm, and a thickness of 0.05 to 0.16 mm, and compression-molding them into a plate shape so that the metal pieces are entangled with each other Soundproofing material. アルミニウム金属片又はアルミニウム合金の金属片は、アルミニウム成形体又はアルミニウム合金の成形体を回転鋸によって切削加工した時に発生する切削屑であることを特徴とする請求項１に記載の多孔質状の防音材。 2. The porous soundproofing according to claim 1, wherein the aluminum metal piece or the aluminum alloy metal piece is cutting waste generated when the aluminum formed body or the aluminum alloy formed body is cut by a rotary saw. Wood.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007219359A (en) * 2006-02-20 2007-08-30 Tottori Univ Fluid sound reducing device
CN105057676A (en) * 2015-08-12 2015-11-18 广州橙行智动汽车科技有限公司 Metal fiber porous material with surface reticular sintering film structure and manufacturing method
JP2019167580A (en) * 2018-03-23 2019-10-03 三菱マテリアル株式会社 Raw material for metal porous body and metal porous body

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007219359A (en) * 2006-02-20 2007-08-30 Tottori Univ Fluid sound reducing device
CN105057676A (en) * 2015-08-12 2015-11-18 广州橙行智动汽车科技有限公司 Metal fiber porous material with surface reticular sintering film structure and manufacturing method
JP2019167580A (en) * 2018-03-23 2019-10-03 三菱マテリアル株式会社 Raw material for metal porous body and metal porous body
CN111801188A (en) * 2018-03-23 2020-10-20 三菱综合材料株式会社 Blank for porous metal body and porous metal body
EP3769868A4 (en) * 2018-03-23 2021-10-06 Mitsubishi Materials Corporation Material for metal porous body and metal porous body
JP7010105B2 (en) 2018-03-23 2022-01-26 三菱マテリアル株式会社 Porous metal
US11590570B2 (en) 2018-03-23 2023-02-28 Mitsubishi Materials Corporation Raw material for metal porous body and metal porous body

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