JP2014185406A - Manufacturing method of fiber mat-like sound absorbing material - Google Patents

Manufacturing method of fiber mat-like sound absorbing material Download PDF

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JP2014185406A
JP2014185406A JP2013060957A JP2013060957A JP2014185406A JP 2014185406 A JP2014185406 A JP 2014185406A JP 2013060957 A JP2013060957 A JP 2013060957A JP 2013060957 A JP2013060957 A JP 2013060957A JP 2014185406 A JP2014185406 A JP 2014185406A
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fiber
mat
fiber material
absorbing material
belt
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JP5863692B2 (en
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Yasushi Hoshino
康 星野
Masakazu Kiyama
雅和 木山
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Nippon Sheet Glass Environment Amenity Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a fiber mat-like sound absorbing material of which a flow resistance of the air varies smoothly in a width direction.SOLUTION: In a manufacturing method of a fiber mat-like sound absorbing material of which a flow resistance of the air varies in a width direction, multiple fibrous material feeding devices 17 moving in a width direction of a belt-like conveyer device 18 are arranged on the belt-like conveyer device 18 so that areas where the moving ranges overlap each other are different. While the belt-like conveyer device 18 is rotation-driven, fibrous material layers are formed on the belt-like conveyer device 18 by feeding the fibrous material from each of the fibrous material feeding devices 17, and the fibrous material in the fibrous material layers are adhered to each other to form a mat-like body.

Description

本発明は、空気の流れ抵抗が幅方向で異なる繊維マット状吸音材の製法に関する。   The present invention relates to a method for producing a fiber mat-like sound absorbing material having different air flow resistance in the width direction.

従来例えば、横方向に長い防音壁に空気の流れ抵抗が上下幅方向で異なる吸音材の使用が提案されている（例えば、特許文献１参照）が、その吸音材は、スポンジや発泡体などから構成されたものを使用することしか考えられておらず、繊維材で空気の流れ抵抗が幅方向で異なるマット状の吸音材に形成するには、例えば、複数枚の繊維状マットを、上下方向で段部を形成するように、その厚み方向に重ねて配置することが容易に考えられる。   Conventionally, for example, it has been proposed to use a sound absorbing material whose air flow resistance is different in the vertical width direction on a sound barrier that is long in the lateral direction (see, for example, Patent Document 1). In order to form a mat-like sound-absorbing material in which the flow resistance of air is different in the width direction, for example, a plurality of fibrous mats can be used in the vertical direction. In order to form a step portion, it can be easily considered that the step portions are arranged in the thickness direction.

国際公開第２０１２／１０２２７８号International Publication No. 2012/102278

上述した従来の横に長い繊維状マットを複数枚重ねて配置し、それらをバラバラにならないように保持しなければならず、手間が多くかかる虞があった。   The above-mentioned conventional long fibrous mats are arranged in a stacked manner and must be held so that they do not fall apart.

従って、本発明の目的は、上記問題点を解消し、空気の流れ抵抗が幅方向で変化する繊維マット状吸音材を、簡単に製造できる方法を提供するところにある。   Accordingly, an object of the present invention is to provide a method for solving the above-mentioned problems and easily producing a fiber mat-like sound absorbing material in which the air flow resistance changes in the width direction.

本発明の第１の特徴構成は、空気の流れ抵抗が幅方向で異なる繊維マット状吸音材の製法であって、帯状コンベア装置の幅方向に移動する複数の繊維材供給装置を、互いに移動範囲の重なる部分が異なるように前記帯状コンベア装置上に配設して、前記帯状コンベア装置を駆動回転させながら、前記繊維材供給装置夫々による繊維材の供給によって前記帯状コンベア装置上に繊維材層を形成し、前記繊維材層における繊維材同士を接着させてマット状に形成するところにある。   A first characteristic configuration of the present invention is a method for producing a fiber mat-like sound absorbing material having different air flow resistances in the width direction, and a plurality of fiber material supply devices moving in the width direction of the belt-like conveyor device are moved to each other. Are disposed on the belt-like conveyor device so that the overlapping portions of the belt-like conveyor devices are different, and the fiber material layer is formed on the belt-like conveyor device by supplying the fiber material by each of the fiber material feeding devices while rotating the belt-like conveyor device. And forming a mat shape by bonding the fiber materials in the fiber material layer.

本発明の第１の特徴構成によれば、帯状コンベア装置の幅方向に移動する複数の繊維材供給装置を、互いに移動範囲の重なる部分が異なるように前記帯状コンベア装置上に配設することにより、繊維材供給装置の移動範囲の重なる部分は、供給される繊維量が多くなる。
従って、繊維材層の空気の流れ抵抗が、幅方向で変化のある繊維マット状吸音材を、帯状コンベア装置による流れ作業で手間を掛けずに製造することができる。 According to the first characteristic configuration of the present invention, the plurality of fiber material supply devices that move in the width direction of the belt-like conveyor device are arranged on the belt-like conveyor device so that the overlapping portions of the movement ranges are different from each other. In the overlapping portion of the moving range of the fiber material supply device, the amount of fiber to be supplied increases.
Therefore, it is possible to manufacture a fiber mat-like sound-absorbing material in which the air flow resistance of the fiber material layer varies in the width direction without trouble in the flow operation by the belt-like conveyor device.

本発明の第２の特徴構成は、前記繊維材供給装置は、繊維材で形成されたシートを供給する装置である。   According to a second characteristic configuration of the present invention, the fiber material supply device supplies a sheet formed of a fiber material.

本発明の第２の特徴構成によれば、繊維材で形成されたシートを供給することにより、各繊維材供給装置における供給領域においては、夫々厚みの均一な繊維材層が形成でき、品質の安定した繊維マットを製造することができる。   According to the second characteristic configuration of the present invention, by supplying a sheet formed of a fiber material, a fiber material layer having a uniform thickness can be formed in each supply region in each fiber material supply device, A stable fiber mat can be produced.

本発明の第３の特徴構成は、前記繊維材供給装置は、多数本の繊維材を前記帯状コンベア装置上に吹き付ける繊維吹付け装置である。   According to a third characteristic configuration of the present invention, the fiber material supply device is a fiber spraying device that sprays a large number of fiber materials onto the belt-like conveyor device.

本発明の第３の特徴構成によれば、繊維吹付け装置からの繊維材の吹付け供給操作のために、繊維吹付け装置の吹付け領域の端部では繊維量は少なくなり、複数の繊維吹付け装置による各供給領域同士の重なる部分と重ならない部分との境界部は、繊維量が滑らかに変化する。   According to the third characteristic configuration of the present invention, the amount of fibers is reduced at the end of the spray region of the fiber spraying device for the fiber material spraying operation from the fiber spraying device. The amount of fibers changes smoothly at the boundary between the overlapping portions and the non-overlapping portions of the supply regions by the spraying device.

本発明の第４の特徴構成は、前記帯状コンベア装置は、ベルトコンベアまたはチェーンコンベアである。   According to a fourth characteristic configuration of the present invention, the belt-like conveyor device is a belt conveyor or a chain conveyor.

本発明の第４の特徴構成によれば、ベルトコンベアまたはチェーンコンベアによる帯状コンベア装置上に繊維材を供給することにより、層状のマットを形成しやすい。   According to the 4th characteristic structure of this invention, it is easy to form a layered mat | matte by supplying a fiber material on the strip | belt-shaped conveyor apparatus by a belt conveyor or a chain conveyor.

本発明の第５の特徴構成は、前記繊維材層における繊維材同士を接着させるのに、熱可塑性樹脂を含んだバインダーを前記繊維材層に混入させておき、前記繊維材層の形成後に加熱させてマット状に形成するところにある。   According to a fifth characteristic configuration of the present invention, in order to bond the fiber materials in the fiber material layer, a binder containing a thermoplastic resin is mixed in the fiber material layer and heated after the formation of the fiber material layer. To form a mat.

本発明の第５の特徴構成によれば、熱可塑性樹脂を含んだバインダーの混入によって、加熱するだけで簡単に繊維材どうしを接着一体化できる。   According to the fifth characteristic configuration of the present invention, the fiber materials can be easily bonded and integrated simply by heating by mixing the binder containing the thermoplastic resin.

本発明の第６の特徴構成は、前記バインダーが、前記繊維材層における主材料の主繊維材よりも低融点の接着用繊維材からなるところにある。   A sixth characteristic configuration of the present invention is that the binder is made of an adhesive fiber material having a lower melting point than that of the main fiber material of the main material in the fiber material layer.

本発明の第６の特徴構成によれば、低融点の接着用繊維材を主繊維材に混入させておくことにより、多数の主繊維材中に接着用繊維材が均等に絡みつきやすく、繊維材層中に安定して保持されやすくなり、繊維マット状吸音材の一体化が確保されやすくなる。   According to the sixth characteristic configuration of the present invention, the fiber material for bonding is easily entangled in a large number of main fiber materials by mixing the fiber material for bonding with a low melting point into the main fiber material. It becomes easy to be stably held in the layer, and integration of the fiber mat-like sound absorbing material is easily ensured.

本発明の第７の特徴構成は、前記繊維材層を加熱する際に、同時にその厚み方向に圧縮するところにある。   The seventh characteristic configuration of the present invention is that when the fiber material layer is heated, it is simultaneously compressed in the thickness direction.

本発明の第７の特徴構成によれば、繊維材層を加熱しながらその厚み方向に圧縮することにより、繊維材同士が密に接着して強度のあるマット状の吸音材に成形できる。
従って、成形後の寸法切り加工や、吸音設備への取付作業を良好に行える吸音材を提供できる。 According to the seventh characteristic configuration of the present invention, by compressing the fiber material layer in the thickness direction while heating, the fiber materials can be closely bonded to each other and formed into a strong mat-like sound absorbing material.
Therefore, it is possible to provide a sound-absorbing material that can satisfactorily perform dimension cutting after molding and attachment to sound-absorbing equipment.

本発明の第８の特徴構成は、前記複数の繊維材供給装置夫々の移動範囲同士の重なる部分を、前記帯状コンベア装置の幅方向の略中央部に配置して、前記繊維材層がその幅方向の略中央部で厚くなるように形成し、前記繊維材層を冷却した後に、そのマット状の前記繊維材層における前記帯状コンベア装置の幅方向の略中央部を切断して、幅方向において空気の流れ抵抗が一方から他方にかけて順次変化する繊維マット状吸音材を形成するところにある。   According to an eighth characteristic configuration of the present invention, the overlapping portion of the moving ranges of the plurality of fiber material supply devices is disposed at a substantially central portion in the width direction of the belt-like conveyor device, and the fiber material layer has a width thereof. After forming the fiber material layer to be thick at a substantially central part in the direction and cooling the fiber material layer, the substantially central part in the width direction of the belt-like conveyor device in the mat-like fiber material layer is cut, in the width direction A fiber mat-like sound-absorbing material in which the air flow resistance changes sequentially from one to the other is formed.

本発明の第８の特徴構成によれば、幅方向において空気の流れ抵抗が一方から他方にかけて順次変化する繊維マット状吸音材を、簡単な加工により製造できる。   According to the eighth characteristic configuration of the present invention, the fiber mat-like sound absorbing material in which the air flow resistance sequentially changes from one to the other in the width direction can be manufactured by simple processing.

本発明の第９の特徴構成は、前記繊維マット状吸音材は防音壁用の吸音材で、防音壁のうちの遮音壁部の端部に厚い部分が位置すると共に、薄い部分が外側に位置するように前記繊維マット状吸音材を配設するものである。   According to a ninth characteristic configuration of the present invention, the fiber mat-shaped sound absorbing material is a sound absorbing material for a sound insulating wall, and a thick portion is located at an end of the sound insulating wall portion of the sound insulating wall and a thin portion is located outside. Thus, the fiber mat-like sound absorbing material is disposed.

本発明の第９の特徴構成によれば、例えば、遮音壁が道路等の音源の側部に形成されるものである場合に、その遮音壁の上端部から迂回して背面側に回り込もうとする騒音が、本発明の製造方法で形成される繊維マット状吸音材を、遮音壁の端部に厚い部分が位置すると共に、薄い部分が外側に位置するように配設されることで、空気の流れ抵抗に変化ある吸音材のエッジ効果抑制作用により、騒音の回り込み現象を防止できるようになる。   According to the ninth characteristic configuration of the present invention, for example, when the sound insulating wall is formed on the side portion of a sound source such as a road, an attempt is made to bypass the upper end portion of the sound insulating wall and go around to the back side. As for the noise, the fiber mat-shaped sound absorbing material formed by the manufacturing method of the present invention is arranged such that the thick part is located at the end of the sound insulation wall and the thin part is located outside, so that the air flow The effect of suppressing the edge effect of the sound-absorbing material that changes in resistance can prevent the noise wraparound phenomenon.

本発明の製法を実施する設備の全体概略斜視図である。It is the whole schematic perspective view of the equipment which enforces the manufacturing method of the present invention. 本発明の製法を実施する設備の全体概略正面図である。It is a whole schematic front view of the equipment which enforces the manufacturing method of the present invention. 繊維材供給部の斜視図である。It is a perspective view of a fiber material supply part. 繊維マット成形部の斜視図である。It is a perspective view of a fiber mat formation part. 冷風供給装置の斜視図である。It is a perspective view of a cold air supply apparatus. 裁断部の斜視図である。It is a perspective view of a cutting part. 別実施形態の設備の全体概略斜視図である。It is the whole equipment schematic perspective view of another embodiment. 別実施形態の設備の全体概略正面図である。It is the whole schematic front view of the installation of another embodiment. 別実施形態の繊維材供給部の斜視図である。It is a perspective view of the fiber material supply part of another embodiment. 繊維マット状吸音材の道路での使用状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the use condition on the road of a fiber mat-like sound-absorbing material.

以下に本発明の空気の流れ抵抗が幅方向で異なる繊維マット状吸音材１０の製法を、図１〜図６に基づいて説明する。   Below, the manufacturing method of the fiber mat-like sound-absorbing material 10 from which the flow resistance of the air of this invention differs in the width direction is demonstrated based on FIGS.

[実施形態１]
ベルトコンベア１からなる帯状コンベア装置１８の幅方向に移動する複数の繊維材供給装置１７として、別装置により予め繊維材で形成されたシート１４を、連続的に供給するクロスレイヤー１５と称される装置を、互いに移動範囲の重なる部分が異なるようにベルトコンベア１上に配設しておく。 [Embodiment 1]
As a plurality of fiber material supply devices 17 that move in the width direction of the belt-like conveyor device 18 that is composed of the belt conveyor 1, it is called a cross layer 15 that continuously supplies sheets 14 that are previously formed of fiber materials by another device. The apparatus is arranged on the belt conveyor 1 so that the overlapping portions of the movement ranges are different from each other.

つまり、ベルトコンベア１における幅方向の略中央部に、重ね代が多くなるように、移動範囲の夫々異なった第１クロスレイヤー１５Ａと、第２クロスレイヤー１５Ｂと、第３クロスレイヤー１５Ｃとを配置した繊維材供給部１９を形成しておく（図１、図２、図３参照）。
前記繊維材供給部１９において、ベルトコンベア１を駆動回転させながら、熱可塑性樹脂を含んだ樹脂系バインダーを混入した多数本のポリエステル繊維ウールからなるシート１４を、複数のクロスレイヤー１５夫々により供給しながら、ベルトコンベア１上に繊維材層４を形成する。
尚、樹脂系バインダーは、繊維材層４の主材料であるポリエステル繊維ウール（通常融点２００℃以上）よりも約１２０℃というような低融点の熱可塑性のポリエステル繊維を使用し、予め、主材料に混入させて供給する。 In other words, the first cross layer 15A, the second cross layer 15B, and the third cross layer 15C having different movement ranges are arranged at the substantially central portion in the width direction of the belt conveyor 1 so that the overlapping margin increases. The fiber material supply part 19 which was made is formed (refer FIG.1, FIG.2, FIG.3).
In the fiber material supply unit 19, while the belt conveyor 1 is driven and rotated, a plurality of polyester fiber wool sheets 14 mixed with a resin binder containing a thermoplastic resin are supplied by a plurality of cross layers 15 respectively. However, the fiber material layer 4 is formed on the belt conveyor 1.
The resin-based binder uses a thermoplastic polyester fiber having a low melting point such as about 120 ° C. lower than that of the polyester fiber wool (usually a melting point of 200 ° C. or higher) which is the main material of the fiber material layer 4. Mixed and supplied.

クロスレイヤー１５の下流側には、繊維マット成形部５を設けてあり、その繊維マット成形部５においては、前記繊維材層４をベルトプレス装置６により加圧しながら加熱して繊維材同士を接着させた後、加圧された繊維材層４に冷風供給装置７による冷却風を吹付け冷却して、圧縮された保形性のあるマット状に形成される（図１、図２、図４、図５参照）。   A fiber mat molding section 5 is provided on the downstream side of the cross layer 15. In the fiber mat molding section 5, the fiber material layer 4 is heated while being pressed by a belt press device 6 to bond the fiber materials together. Then, the compressed fiber layer 4 is cooled by blowing the cooling air from the cold air supply device 7 to form a compressed shape-retaining mat (FIGS. 1, 2, and 4). FIG. 5).

従って、前述のように、ベルトコンベア１の幅方向に複数のクロスレイヤー１５が往復移動しながら多数本の繊維材を吹付けて形成される繊維材層４が、その厚み方向に加熱圧縮されることにより、ベルトコンベア１の幅方向の略中央部が他の部分より厚い繊維マット状吸音材１０が形成される。   Accordingly, as described above, the fiber material layer 4 formed by spraying a large number of fiber materials while the plurality of cross layers 15 reciprocate in the width direction of the belt conveyor 1 is heated and compressed in the thickness direction. As a result, the fiber mat-like sound absorbing material 10 is formed in which the substantially central portion in the width direction of the belt conveyor 1 is thicker than the other portions.

前記マット状吸音材は、繊維マット成形部５の下流側に形成した裁断部８において（図１、図２、図６参照）、ベルト幅方向に複数配設した回転カッター９により、ベルト幅方向において繊維マット状吸音材１０の両端部と、略中央部を切断して、繊維材層４の幅方向において空気の流れ抵抗が一方から他方にかけて順次変化する繊維マット吸音材１０が形成される。
尚、裁断された繊維マット吸音材１０は、ベルトコンベア１の長手方向において使用に必要な長さに切断されて、例えば、図１０に示すような道路１１に沿った防音壁１２における遮音壁部１３の上端部に、繊維マット吸音材の厚い部分が位置すると共に、薄い部分が外側（上側）に位置するように取り付けられ、道路１１上で発生した音が遮音壁部１３の上端部から背面側へ回り込む音の回り込み現象を防止できるようになる。 The mat-like sound-absorbing material is cut in the belt width direction by a plurality of rotary cutters 9 arranged in the belt width direction at a cutting portion 8 formed on the downstream side of the fiber mat molding portion 5 (see FIGS. 1, 2, and 6). 2, the both ends of the fiber mat-shaped sound absorbing material 10 and the substantially central portion are cut to form the fiber mat sound absorbing material 10 in which the air flow resistance sequentially changes from one to the other in the width direction of the fiber material layer 4.
The cut fiber mat sound-absorbing material 10 is cut to a length necessary for use in the longitudinal direction of the belt conveyor 1, and for example, a sound insulating wall portion 13 in a sound insulating wall 12 along the road 11 as shown in FIG. A thick portion of the fiber mat sound-absorbing material is located at the upper end portion of the door, and a thin portion is attached on the outer side (upper side), so that the sound generated on the road 11 passes from the upper end portion of the sound insulation wall portion 13 to the back side. This makes it possible to prevent the sound wraparound phenomenon.

[実施形態２]
以下に、本発明における別の実施形態の繊維マット状吸音材の製法を、図７〜９に基づいて説明する。
ベルトコンベア１からなる帯状コンベア装置１８の幅方向に移動する複数の繊維材供給装置１７としてのノズル２を、互いに移動範囲の重なる部分が異なるようにベルトコンベア１上に配設しておく。つまり、ベルトコンベア１における幅方向の略中央部に、重ね代が多くなるように、移動範囲の夫々異なった第１ノズル２Ａと、第２ノズル２Ｂと、第３ノズル２Ｃとを配置した繊維材吹付け部３を形成しておく（図７、図８、図９参照）。 [Embodiment 2]
Below, the manufacturing method of the fiber mat-like sound-absorbing material of another embodiment in this invention is demonstrated based on FIGS.
The nozzles 2 as the plurality of fiber material supply devices 17 that move in the width direction of the belt-like conveyor device 18 including the belt conveyor 1 are arranged on the belt conveyor 1 so that the overlapping portions of the movement ranges are different from each other. That is, the fiber material in which the first nozzle 2A, the second nozzle 2B, and the third nozzle 2C having different movement ranges are arranged in the substantially central portion in the width direction of the belt conveyor 1 so that the overlapping margin increases. The spraying part 3 is formed (refer FIG.7, FIG.8, FIG.9).

前記繊維材吹付け部３において、ベルトコンベア１を駆動回転させながら、熱可塑性樹脂を含んだ樹脂系バインダーを混入した多数本のポリエステル繊維ウールからなる繊維材を、複数のノズル２夫々により吹き付け、ベルトコンベア１上に繊維材層４を形成する。
尚、樹脂系バインダーは、繊維材層４の主材料であるポリエステル繊維ウール（通常融点２００℃以上）よりも約１２０℃というような低融点の熱可塑性のポリエステル繊維を使用し、予め、主材料に混入させて供給する。 In the fiber material spraying section 3, while driving and rotating the belt conveyor 1, a fiber material made of a plurality of polyester fiber wool mixed with a resin-based binder containing a thermoplastic resin is sprayed by a plurality of nozzles 2, respectively. A fiber material layer 4 is formed on the belt conveyor 1.
The resin-based binder uses a thermoplastic polyester fiber having a low melting point such as about 120 ° C. lower than that of the polyester fiber wool (usually a melting point of 200 ° C. or higher) which is the main material of the fiber material layer 4. Mixed and supplied.

繊維材吹付け部３の下流側には、繊維マット成形部５を設けてあり、その繊維マット成形部５においては、前記繊維材層４をベルトプレス装置６により加圧しながら加熱して繊維材同士を接着させた後、加圧された繊維材層４に冷風供給装置７による冷却風を吹付け冷却して、圧縮された保形性のあるマット状に形成される（図７、図８、図４、図５参照）。   A fiber mat molding part 5 is provided on the downstream side of the fiber material spraying part 3. In the fiber mat molding part 5, the fiber material layer 4 is heated while being pressed by a belt press device 6 to produce a fiber material. After adhering each other, the compressed fiber layer 4 is cooled by blowing cooling air from the cold air supply device 7 to form a compressed shape-retaining mat (FIGS. 7 and 8). FIG. 4 and FIG. 5).

従って、前述のように、ベルトコンベア１の幅方向に複数のノズル２が往復移動しながら多数本の繊維材を吹付けて形成される繊維材層４が、その厚み方向に加熱圧縮されることにより、ベルトコンベア１の幅方向の略中央部が他の部分より厚い繊維マット状吸音材１０が形成される。
また、ノズル２からの繊維材の吹付け供給操作のために、ノズル２の吹付け領域の端部では繊維量は少なくなり、複数のノズル２による各供給領域同士の重なる部分と重ならない部分との境界部は、繊維量が滑らかに変化する。 Therefore, as described above, the fiber material layer 4 formed by spraying a large number of fiber materials while the plurality of nozzles 2 reciprocate in the width direction of the belt conveyor 1 is heated and compressed in the thickness direction. As a result, the fiber mat-like sound absorbing material 10 having a substantially central portion in the width direction of the belt conveyor 1 thicker than other portions is formed.
Further, because of the operation of spraying and supplying the fiber material from the nozzle 2, the amount of fibers is reduced at the end of the spray region of the nozzle 2, and the portions where the supply regions of the plurality of nozzles 2 do not overlap with each other. In the boundary portion, the amount of fibers changes smoothly.

前記マット状吸音材は、繊維マット成形部５の下流側に形成した裁断部８において（図７、図８、図６参照）、ベルト幅方向に複数配設した回転カッター９により、ベルト幅方向において繊維マット状吸音材１０の両端部と、略中央部を切断して、繊維材層４の幅方向において空気の流れ抵抗が一方から他方にかけて順次変化する繊維マット吸音材１０が形成される。
尚、裁断された繊維マット吸音材１０は、ベルトコンベア１の長手方向において使用に必要な長さに切断されて、例えば、図１０に示すような道路１１に沿った防音壁１２における遮音壁部１３の上端部に、繊維マット吸音材の厚い部分が位置すると共に、薄い部分が外側（上側）に位置するように取り付けられ、道路１１上で発生した音が遮音壁部１３の上端部から背面側へ回り込む音の回り込み現象を防止できるようになる。 The mat-like sound-absorbing material is cut in the belt width direction by a plurality of rotary cutters 9 arranged in the belt width direction at a cutting portion 8 formed on the downstream side of the fiber mat molding portion 5 (see FIGS. 7, 8, and 6). 2, the both ends of the fiber mat-shaped sound absorbing material 10 and the substantially central portion are cut to form the fiber mat sound absorbing material 10 in which the air flow resistance sequentially changes from one to the other in the width direction of the fiber material layer 4.
The cut fiber mat sound-absorbing material 10 is cut to a length necessary for use in the longitudinal direction of the belt conveyor 1, and for example, a sound insulating wall portion 13 in a sound insulating wall 12 along the road 11 as shown in FIG. A thick portion of the fiber mat sound-absorbing material is located at the upper end portion of the door, and a thin portion is attached on the outer side (upper side), so that the sound generated on the road 11 passes from the upper end portion of the sound insulation wall portion 13 to the back side. This makes it possible to prevent the sound wraparound phenomenon.

〔別実施形態〕
以下に他の実施の形態を説明する。
〈１〉 前記繊維材供給装置１７は、繊維材で形成されたシート１４の供給装置のほかに、繊維材を多数吹き付けるノズル２や、ダクトであってもよく、また、繊維材供給装置１７の一例としてのノズル２の場合でも、第１ノズル２Ａ、第２ノズル２Ｂ、第３ノズル２Ｃ以外に３個以上の夫々往復移動範囲の異なるノズル２を配置したり、往復移動範囲の異なる２個のノズル２のみで構成してあってもよい。また、往復移動範囲の異なる繊維材供給装置１７の移動速度を互いに異ならせても良い。
〈２〉 複数の繊維材供給装置１７の移動範囲は、ベルトコンベア１の幅方向における略中央部が一番厚い繊維材層４を形成するように配置する以外に、一方側の端が一番厚くなる様に配設してあってもよく、また、幅方向の複数個所が厚くなるように配設してあってもよい。また前記繊維材供給装置１７の一例として、実施形態１で示した第１クロスレイヤー１５Ａ、第２クロスレイヤー１５Ｂ、第３クロスレイヤー１５Ｃは、ベルトコンベア１の移送方向に、夫々の往復移動範囲が順次小幅になるように形成されているが、逆に、移送方向に順次幅が大きくなるように形成してあってもよい。つまり、第１クロスレイヤー１５Ａが一番小幅に設定してあってもよく、繊維材供給装置の一例がノズルの場合でも同様である。
〈３〉 前記繊維材は、ポリエステル繊維ウール以外の合成繊維や、ガラスウール、ロックウールなどの無機繊維であっても良い。
〈４〉 前記バインダーとして、主材料であるポリエステル繊維ウールに対して混入するポリエステル繊維等の繊維系バインダーの例を示したが、その繊維系バインダーの種類は、他の熱可塑性繊維であってもよく、また、その主材料と繊維系バインダーとの融点の差は、例示した温度差以外の組み合わせでもよく、特に限定されるものでもない。更に、前記バインダーは、熱可塑性の繊維以外に熱可塑性樹脂を繊維材に混在させてあってもよい。また、熱可塑性樹脂以外に、接着性のある材料であるならば、溶剤系でも又は、常温硬化型の無機材料でも良い。
〈５〉 前記ベルトプレス装置６以外にローラプレス装置であってもよく、それらによる加圧方法は、複数のノズル２による繊維材吹付け量の多い部分が他の部分よりも厚くなるプレス方法以外に、繊維材層４の全幅にわたって同厚になるような加圧方法であってもよく、結局、幅方向において、繊維材吹付け量の多い部分において空気の流れ抵抗が他よりも大になればよい。
〈６〉 前記ベルトプレス装置６による加圧、加熱において、ベルトを通しての温風加熱が採用されるが、その温風の吹付け方向は、ベルトプレス装置６のベルトを通しての上からの温風吹付け以外に、ベルトコンベア１を通しての下からの温風吹付けであってもよく、また、温風による加熱以外の加熱手段を使用してもよい。
〈７〉 前記冷風共有装置７による冷却風の吹付方向は、繊維材層４に対して上からの吹付けの例を示したが、下からの吹付け冷却であってもよく、冷風以外の他の冷却手段を使用してもよい。
〈８〉 前記帯状コンベア装置１８としては、ベルトコンベアを例に挙げたが、チェーンコンベアに分類される金網状のコンベア装置や、スノコ状、布状、等の通気性のあるコンベア装置でも良い。
〈９〉 前記繊維マット状吸音材は、繊維材層４の一体化のみならず、その表裏に補強のために、クロスを貼り付けて製品化してもよい。 [Another embodiment]
Other embodiments will be described below.
<1> The fiber material supply device 17 may be a nozzle 2 or a duct for spraying a large number of fiber materials, in addition to the supply device for the sheet 14 formed of the fiber material. Even in the case of the nozzle 2 as an example, in addition to the first nozzle 2A, the second nozzle 2B, and the third nozzle 2C, three or more nozzles 2 having different reciprocating ranges may be arranged, or two nozzles having different reciprocating ranges may be arranged. You may comprise only the nozzle 2. FIG. Further, the moving speeds of the fiber material supply devices 17 having different reciprocating ranges may be made different from each other.
<2> The movement range of the plurality of fiber material supply devices 17 is such that the end on one side is the most in addition to the arrangement in which the substantially central portion in the width direction of the belt conveyor 1 forms the thickest fiber material layer 4. You may arrange | position so that it may become thick, and you may arrange | position so that several places of the width direction may become thick. As an example of the fiber material supply device 17, each of the first cross layer 15 </ b> A, the second cross layer 15 </ b> B, and the third cross layer 15 </ b> C shown in the first embodiment has a reciprocal movement range in the transfer direction of the belt conveyor 1. Although the width is formed so as to be sequentially smaller, it may be formed so that the width is gradually increased in the transfer direction. That is, the first cross layer 15A may be set to the smallest width, and the same applies even when the example of the fiber material supply device is a nozzle.
<3> The fiber material may be synthetic fibers other than polyester fiber wool, or inorganic fibers such as glass wool and rock wool.
<4> Although the example of fiber binders, such as a polyester fiber mixed with the polyester fiber wool which is the main material, was shown as the binder, the kind of the fiber binder may be other thermoplastic fibers. In addition, the difference in melting point between the main material and the fiber-based binder may be a combination other than the illustrated temperature difference, and is not particularly limited. Further, the binder may include a thermoplastic resin mixed with the fiber material in addition to the thermoplastic fiber. In addition to the thermoplastic resin, as long as it is an adhesive material, it may be a solvent type or a room temperature curable inorganic material.
<5> A roller press device other than the belt press device 6 may be used, and a pressurizing method using them may be a press method in which a portion where the amount of fiber material sprayed by the plurality of nozzles 2 is thicker than other portions. In addition, the pressure method may be the same thickness over the entire width of the fiber material layer 4, and in the end, in the width direction, the air flow resistance becomes larger than the others in the portion where the fiber material spray amount is large. That's fine.
<6> In the pressurization and heating by the belt press device 6, hot air heating through the belt is adopted, and the hot air is blown from above through the belt of the belt press device 6. In addition to this, warm air blowing from below through the belt conveyor 1 may be used, and heating means other than heating by warm air may be used.
<7> The cooling air blowing direction by the cold air sharing device 7 shows an example of blowing from above on the fiber material layer 4, but may be blowing cooling from below, other than cold air. Other cooling means may be used.
<8> Although the belt-shaped conveyor device 18 is exemplified as the belt-shaped conveyor device 18, it may be a wire mesh conveyor device classified as a chain conveyor, or a breathable conveyor device such as a snowboard shape or a cloth shape.
<9> The fiber mat-shaped sound-absorbing material may be commercialized not only by integrating the fiber material layer 4 but also by attaching a cloth to the front and back for reinforcement.

尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。また、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。   In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

４ 繊維材層
１０ 繊維マット状吸音材
１２ 防音壁
１３ 遮音壁部
１４ シート
１７ 繊維材供給装置
１８ 帯状コンベア装置 4 Fiber material layer 10 Fiber mat-shaped sound absorbing material 12 Sound insulation wall 13 Sound insulation wall portion
14 Sheet 17 Textile material supply device 18 Strip conveyor device

Claims (9)

空気の流れ抵抗が幅方向で異なる繊維マット状吸音材の製法であって、
帯状コンベア装置の幅方向に移動する複数の繊維材供給装置を、互いに移動範囲の重なる部分が異なるように前記帯状コンベア装置上に配設して、
前記帯状コンベア装置を駆動回転させながら、前記繊維材供給装置夫々による繊維材の供給によって前記帯状コンベア装置上に繊維材層を形成し、
前記繊維材層における繊維材同士を接着させてマット状に形成する繊維マット状吸音材の製法。 It is a manufacturing method of a fiber mat-like sound-absorbing material having different air flow resistance in the width direction,
A plurality of fiber material supply devices that move in the width direction of the belt-like conveyor device are arranged on the belt-like conveyor device so that the overlapping portions of the movement ranges are different from each other,
While driving and rotating the belt-like conveyor device, a fiber material layer is formed on the belt-like conveyor device by supplying the fiber material by each of the fiber material feeding devices,
A method for producing a fiber mat-shaped sound absorbing material, in which the fiber materials in the fiber material layer are bonded together to form a mat shape. 前記繊維材供給装置は、繊維材で形成されたシートを供給する装置である請求項１に記載の繊維マット状吸音材の製法。   The method for producing a fiber mat-shaped sound absorbing material according to claim 1, wherein the fiber material supply device is a device that supplies a sheet formed of a fiber material. 前記繊維材供給装置は、多数本の繊維材を前記帯状コンベア装置上に吹き付ける繊維吹付け装置である請求項１に記載の繊維マット状吸音材の製法。   The said fiber material supply apparatus is a fiber spraying apparatus which sprays many fiber materials on the said strip | belt-shaped conveyor apparatus, The manufacturing method of the fiber mat-shaped sound-absorbing material of Claim 1. 前記帯状コンベア装置は、ベルトコンベアまたはチェーンコンベアである請求項１〜３のいずれか１項に記載の繊維マット状吸音材の製法。   The said band-shaped conveyor apparatus is a belt conveyor or a chain conveyor, The manufacturing method of the fiber mat-shaped sound-absorbing material of any one of Claims 1-3. 前記繊維材層における繊維材同士を接着させるのに、熱可塑性樹脂を含んだバインダーを前記繊維材層に混入させておき、
前記繊維材層の形成後に加熱させてマット状に形成する請求項１〜４のいずれか１項に記載の繊維マット状吸音材の製法。 In order to bond the fiber materials in the fiber material layer, a binder containing a thermoplastic resin is mixed in the fiber material layer,
The method for producing a fiber mat-shaped sound absorbing material according to any one of claims 1 to 4, wherein the fiber mat layer is heated to form a mat after forming the fiber material layer. 前記バインダーが、前記繊維材層における主材料の主繊維材よりも低融点の接着用繊維材からなる請求項５に記載の繊維マット状吸音材の製法。   The method for producing a fiber mat-shaped sound absorbing material according to claim 5, wherein the binder is made of an adhesive fiber material having a lower melting point than that of the main fiber material of the main material in the fiber material layer. 前記繊維材層を加熱する際に、同時にその厚み方向に圧縮する請求項５または６に記載の繊維マット状吸音材の製法。   The method for producing a fiber mat-shaped sound absorbing material according to claim 5 or 6, wherein the fiber material layer is simultaneously compressed in the thickness direction when the fiber material layer is heated. 前記複数の繊維材供給装置夫々の移動範囲同士の重なる部分を、前記帯状コンベア装置の幅方向の略中央部に配置して、前記繊維材層がその幅方向の略中央部で厚くなるように形成し、
前記繊維材層を冷却した後に、そのマット状の前記繊維材層における前記帯状コンベア装置の幅方向の略中央部を切断して、幅方向において空気の流れ抵抗が一方から他方にかけて順次変化する繊維マット状吸音材を形成する請求項５〜７のいずれか１項に記載の繊維マット状吸音材の製法。 The overlapping portions of the moving ranges of the plurality of fiber material supply devices are arranged at a substantially central portion in the width direction of the belt-shaped conveyor device so that the fiber material layer is thick at a substantially central portion in the width direction. Forming,
After the fiber material layer is cooled, the mat-shaped fiber material layer is cut at a substantially central portion in the width direction of the belt-like conveyor device, and the air flow resistance sequentially changes from one to the other in the width direction. The method for producing a fiber mat-shaped sound absorbing material according to any one of claims 5 to 7, wherein the mat-shaped sound absorbing material is formed. 前記繊維マット状吸音材は防音壁用の吸音材で、防音壁のうちの遮音壁部の端部に厚い部分が位置すると共に、薄い部分が外側に位置するように前記繊維マット状吸音材を配設するものである請求項８に記載の繊維マット状吸音材の製法。   The fiber mat-shaped sound absorbing material is a sound absorbing material for a soundproof wall, and the fiber mat-shaped sound absorbing material is arranged so that a thick portion is located at the end of the sound insulating wall portion of the soundproof wall and a thin portion is located outside. The method for producing a fiber mat-shaped sound-absorbing material according to claim 8, which is provided.
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