JP2015169050A - Sound absorbing panel and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound absorbing panel capable of enhancing a sound absorption effect, and a method of manufacturing the same.SOLUTION: In a sound absorbing panel 100, a plurality of cavity parts 210, 220 and 230 are formed within a body. The cavity parts 210, 220 and 230 are different in volume from one another. Slits 310 and 320 communicate with only the side of one surface of the body from the cavity parts 210, 220 and 230. Additionally, the plurality of slits 310 and 320 have different widths, respectively. A plurality of combinations of the volumes of the cavity parts 210, 220 and 230 and the widths of the slits 310 and 320 are formed.

Description

  The present invention relates to a sound absorbing panel for soundproofing and a method for manufacturing the sound absorbing panel.

  Various research and development have been conducted for the purpose of sound insulation. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 6-1229029) has a plurality of resonance chambers that are used as soundproofing measures for Shinkansen, highways, etc., and that correspond to a frequency width (band) that requires sound absorption, A resonance type sound absorbing and sound insulating panel having excellent weather resistance, durability, uniform quality, excellent workability, and excellent sound absorption efficiency and sound insulation performance is disclosed.

  The sound insulation panel described in Patent Document 1 (Japanese Patent Laid-Open No. 6-1229029) includes a bottom wall, a surface wall disposed opposite to the bottom wall, and a space between the bottom wall and the surface wall. A plurality of resonance chambers having two or more different cross-sectional areas matched to the sound absorption target frequency are formed by a plurality of partition walls arranged at predetermined intervals in the surface direction, and these resonance chambers communicate with the outside. In a resonance type sound absorbing / sound insulating panel in which sound absorbing holes are formed on the surface wall portion, the resonance chambers are arranged so that those having the same cross-sectional area are not adjacent to each other, and the depth of the sound absorbing holes is extended to the surface wall portion. For this purpose, a lip-shaped protrusion is provided.

JP-A-6-1229029

  As described above, the sound to be absorbed often has peaks at a plurality of frequencies or has a wide frequency range. In addition, the resonance type sound absorbing / sound insulating panel described in Patent Document 1 has a merit that a plurality of sound absorbing frequencies can be possessed by having a plurality of cavities in the longitudinal section.

  However, in the resonance type sound absorption / sound insulation panel described in Patent Document 1, the number of cavities having a plurality of sizes in the cross-sectional shape is limited, and the number of frequencies that can be absorbed is also limited.

An object of the present invention is to provide a sound-absorbing panel that can enhance the sound-absorbing effect and a method for manufacturing the sound-absorbing panel.
Another object of the present invention is to provide a sound-absorbing panel and a method for manufacturing the sound-absorbing panel that can enhance vibration damping, heat insulation, and sound insulation effects.

(1)
A sound-absorbing panel according to one aspect is a sound-absorbing panel having a longitudinal direction, and includes a plurality of cavities formed inside the main body and having different volumes, and slits that communicate only from the cavity to one surface side of the main body. Have different widths, and a plurality of combinations of the volume of the cavity and the width of the slit are formed.

  In the sound absorbing panel according to the present invention, a plurality of cavities are formed inside the main body. The cavities have different volumes. And a slit is connected only from the cavity part to the one surface side of the main body. The plurality of slits have different widths. A plurality of combinations of the volume of the cavity and the width of the slit are formed.

  As a result, since the volume of the cavity is different, the frequency band in which sound can be absorbed can be widened. In addition, a large number of slit widths exist, and a plurality of combinations of the cavity and the slit are formed, so that it is possible to further widen the frequency band in which sound can be absorbed. Therefore, the sound absorption effect can be enhanced.

(2)
The sound absorbing panel according to the second aspect of the present invention is the sound absorbing panel according to one aspect, wherein the volume of the hollow portion may change along the longitudinal direction.

  In this case, since the volume of the hollow portion changes along the longitudinal direction, the frequency band in which sound can be absorbed can be further expanded.

(3)
In the sound absorbing panel according to the third aspect of the present invention, in the sound absorbing panel according to one aspect or the second aspect of the invention, the width of the slit may change along the longitudinal direction.

  In this case, since the width of the slit changes along the longitudinal direction, the frequency band in which sound can be absorbed can be further expanded.

(4)
A sound-absorbing panel according to another aspect is a sound-absorbing panel having a longitudinal direction, and includes a hollow portion formed inside the main body and a slit that communicates only from the hollow portion to one surface side of the main body. The volume changes along the direction.

  In the sound absorbing panel according to the present invention, a cavity is formed inside the main body. And a slit is connected only from the cavity part to the one surface side of the main body. Further, the volume of the hollow portion changes along the longitudinal direction.

  As a result, since the volume of the cavity changes along the longitudinal direction, the frequency band in which sound can be absorbed can be widened. Therefore, the sound absorption effect can be enhanced.

(5)
The sound absorbing panel according to a fifth aspect of the present invention is the sound absorbing panel according to another aspect, wherein the slit may have a width that varies along the longitudinal direction.

  In this case, since the width of the slit changes along the longitudinal direction, the frequency band in which sound can be absorbed can be further expanded.

(6)
The sound absorbing panel according to a sixth aspect of the present invention is the sound absorbing panel according to another aspect or the fifth aspect of the present invention, wherein a plurality of cavities are formed and have different volumes, the slits have different widths, and the volume of the cavities There may be a plurality of combinations of the widths of the slits.

  In this case, a plurality of cavities are formed, the volumes are different, the slits have different widths, and a plurality of combinations of the volume of the cavity and the width of the slit are formed, so that the frequency band capable of absorbing sound is further widened. be able to. Therefore, the sound absorption effect can be enhanced.

(7)
A sound absorbing panel according to still another aspect is a sound absorbing panel having a longitudinal direction, and includes a hollow portion formed inside the main body and a slit that communicates only from the hollow portion to one surface side of the main body. The width changes along the direction.

  In the sound absorbing panel according to the present invention, a cavity is formed inside the main body. And a slit is connected only from the cavity part to the one surface side of the main body. Moreover, the width | variety of a slit changes along a longitudinal direction.

  As a result, since the width of the slit changes along the longitudinal direction, the frequency band capable of absorbing sound can be widened. Therefore, the sound absorption effect can be enhanced.

(8)
The sound absorbing panel according to the eighth aspect of the present invention is the sound absorbing panel according to still another aspect, wherein the volume of the hollow portion may change along the longitudinal direction.

  In this case, since the volume of the hollow portion changes along the longitudinal direction, the frequency band in which sound can be absorbed can be further expanded.

(9)
The sound absorbing panel according to the ninth aspect of the present invention is the sound absorbing panel according to yet another aspect or the eighth aspect of the present invention, wherein a plurality of cavities are formed and have different volumes, and the slits have different widths. There may be a plurality of combinations of volume and slit width.

  In this case, a plurality of cavities are formed, the volumes are different, the slits have different widths, and a plurality of combinations of the volume of the cavity and the width of the slit are formed, so that the frequency band capable of absorbing sound is further widened. be able to. Therefore, the sound absorption effect can be enhanced.

(10)
A sound absorbing panel according to a tenth aspect is the sound absorbing panel according to one aspect through the ninth aspect, wherein the main body may be made of a foam material.

  In this case, since the main body is made of a foam material, not only a sound absorbing effect but also a heat insulating effect can be obtained.

(11)
In the sound absorbing panel according to the eleventh aspect of the present invention, in the sound absorbing panel according to one aspect to the tenth aspect, a mixed resin having a specific gravity of the main body of 1.8 or more may be used.

  In this case, since the specific gravity of the main body is 1.8 or more, the sound insulation performance can be improved based on the weight rule.

(12)
A sound absorbing panel according to a twelfth aspect of the present invention is the sound absorbing panel according to one aspect to the eleventh aspect, wherein a resin layer different from the main body may be provided on a surface different from the opening of the slit.

  The different resin layers are desirably provided by multilayer extrusion molding. In this case, by using a damping material such as chlorinated polyethylene as a different resin, a damping effect can also be obtained.

(13)
The sound absorbing panel according to a thirteenth aspect is the sound absorbing panel according to any one of the aspects to the twelfth aspect, wherein at least one of the plurality of cavities may be partitioned into a plurality of spaces.

  In this case, the cavity is partitioned into a plurality of spaces. Therefore, a closed space can be formed, and a heat insulating effect can be obtained due to the convection suppressing effect. In order to suppress convection, the thickness of the cavity is preferably 6 mm or less.

(14)
A sound absorbing panel according to a fourteenth aspect of the present invention is the sound absorbing panel according to any one of the first aspect to the thirteenth aspects, wherein the plurality of spaces have communication slits in adjacent spaces, and the opposing slit positions are different. Also good.

  In this case, the plurality of spaces have the communication slits of the adjacent spaces, and the slit positions facing each other are different, so that the resonance type sound absorption effect can be further enhanced in the space. Since there is an effect of widening the sound absorption frequency, it is possible to widen the frequency band for sound absorption.

(15)
A method of manufacturing a sound absorbing panel according to another aspect is the method of manufacturing a sound absorbing panel according to any one of claims 1 to 14, wherein the polymer material is extruded to form a body having a cavity and a slit. It includes a process.

  In this case, since the sound absorbing panel can be formed by the extrusion process of the polymer material, it can be manufactured in large quantities at a low cost.

(16)
The sound absorbing panel manufacturing method according to the sixteenth aspect of the present invention is the sound absorbing panel manufacturing method according to another aspect, wherein the extrusion step may include a core moving step of changing the volume of the cavity and the width of the slit.

  In this case, the volume of the cavity and the slit width can be changed by the core moving step. As a result, the frequency band can be expanded.

It is a typical perspective view which shows a part of sound-absorbing panel concerning this Embodiment. It is a typical perspective view which shows the other example of a sound absorption panel. It is a typical perspective view which shows the other example of a sound absorption panel. It is a schematic cross section which shows an example of the cross section of the sound absorption panel of FIG. It is a schematic cross section which shows another example of the cross section of the sound absorption panel of FIG. It is a typical perspective view which shows the other example of a sound absorption panel. It is a schematic diagram which shows an example of the manufacturing process of a sound absorption panel.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Moreover, in the case of the same code | symbol, those names and functions are also the same. Therefore, detailed description thereof will not be repeated.

(Sound absorbing panel)
FIG. 1 is a schematic perspective view showing a part of a sound absorbing panel 100 according to the present embodiment.

As shown in FIG. 1, the sound absorbing panel 100 includes a main body 110 having a longitudinal direction (z direction in the drawing). The main body 110 is made of a polymer material. If the polymer material is, for example, vinyl chloride, polyethylene (PE), polypropylene (PP), etc., it can be realized at low cost.
Two first cavities 210, two second cavities 220, and three third cavities 230 are formed in the main body 110.

  The first cavity 210 has a cross-sectional area in the xy plane that is larger than the cross-sectional areas of the second cavity 220 and the third cavity 230, and the second cavity 220 has a cross-sectional area in the xy plane of the third cavity 230. It is formed larger than the cross-sectional area.

  A first slit 310 is formed in one of the two cavities 210 shown in FIG. 1 to connect the surface 120 of the main body 110, and the other first cavity 210 has a first slit 310. A second slit 320 that connects the surface 120 is formed.

  In addition, one of the two second cavities 220 is formed with a first slit 310 that connects the surface 120 of the main body 110, and the other second cavities 220 have a surface 120 of the main body 110. A second slit 320 is formed to connect the two.

  In addition, one of the two third cavities 230 is formed with a first slit 310 that connects the surface 120 of the main body 110, and the other third cavities 230 have a surface 120 of the main body 110. A second slit 320 is formed to connect the two.

  The width of the first slit 310 in the x direction is larger than the width of the second slit 320 in the x direction.

  As described above, the sound absorbing panel 100 shown in FIG. 1 includes six sets of combinations of the first cavity 210, the second cavity 220, the third cavity 230, the first slit 310, and the second slit 320.

(Other examples of sound absorbing panels)
FIG. 2 is a schematic perspective view showing another example of the sound absorbing panel 100.

  As shown in FIG. 2, the sound absorbing panel 100 a is formed with a cavity 240 and a third slit 330 with respect to the main body 110.

  The cavity 240 is formed such that the cross-sectional area in the xy plane changes as it moves in the z direction. In particular, the lower surface 241 of the cavity 240 is formed to be curved.

  The third slit 330 is formed so that the width in the x direction changes as it moves in the z direction.

In addition, although the sound absorption panel 100a shown in FIG. 2 demonstrated the case where the cavity part 240 was one, it is not limited to this, You may provide many cavity parts.
Furthermore, although the case where the lower surface 241 of the cavity portion 240 is curved and changed has been described, the present invention is not limited to this, and the upper surface disposed to face the lower surface 241 may be curved, and the wall surface in the X direction is curved and formed. May be.

(Other examples of sound absorbing panels)
3 is a schematic perspective view showing still another example of the sound absorbing panel 100, FIG. 4 is a schematic sectional view showing an example of a cross section of the sound absorbing panel 100b in FIG. 3, and FIG. It is a schematic cross section which shows another example of the cross section of the sound-absorbing panel 100b.

  As shown in FIG. 3, the sound absorbing panel 100 b has a slit 340 on the exterior of the main body 110. As shown in FIG. 4, the sound absorbing panel 100 b includes a cavity 250,..., A cavity 290 and communication ports 410,.

  As shown in FIG. 4, the outside of the main body 110 communicates with the cavity 250 through the slit 340, the cavity 250 and the cavity 260 communicate with each other through the communication port 410, and the cavity 260 and the cavity 270 communicate with each other. The port 420 communicates with each other, the cavity 270 and the cavity 280 communicate with each other through the communication port 430, and the cavity 280 and the cavity 290 communicate with each other through the communication port 440.

  Further, the communication port 410 and the communication port 420, the communication port 420 and the communication port 430, and the communication port 430 and the communication port 440 are formed at different positions.

  In addition, as shown in FIG. 5, the lengths in the y direction of the cavities 250 to 290 may be individually different. Further, as the sound absorbing panel 100b of FIG. 3 moves in the z direction, the cross section may be changed from FIG. 4 to FIG.

  Further, in FIG. 5, the length in the y direction is changed, but the present invention is not limited to this, and the length in the x direction may be changed.

  Moreover, it is preferable that the space width (cavity thickness) of the y direction of the cavity part 260 ... of FIG. 4 and FIG. 5 and the cavity part 290 is 6 mm or less. As a result, air convection is suppressed, and not only the sound absorbing performance of the sound absorbing panel 100b but also the convection suppressing effect can be achieved, so that heat insulating performance can be achieved. Note that the hollow portion 250 may also be 6 mm or less.

  Further, in FIG. 4 and FIG. 5, one communication port 410,..., And one communication port 440 are provided, but the present invention is not limited to this.

(Other examples of sound absorbing panels)
Subsequently, FIG. 6 is a schematic perspective view showing still another example of the sound absorbing panel 100.

As shown in FIG. 6, the sound absorbing panel 100 c is obtained by covering a part of the opening of the sound absorbing panel 100 shown in FIG. 1 with a member 520.
The covering member 520 may be wallpaper, resin, another plate, a sheet, or the like. As a result, the slits 310 to 340 can be made inconspicuous. In particular, when the slits 310 to 340 are disposed on the indoor side, a part of the slits 310 to 340 can be hidden. The member 520 for covering up may be divided into a plurality of pieces as shown in FIG. 6, or may be a single porous piece. The best member 520 is preferably a wallpaper having small pores.
Note that as a method of covering (bonding) with the member 520, an arbitrary method such as adhesion, screw, or nail can be used.

  In addition, a thin layer of chlorinated polyethylene (Kalmoon manufactured by Sekisui Chemical Co., Ltd.) may be provided on the opposite side of the portion where the member 520 of FIG. 6 is provided. In this case, not only the sound absorbing performance of the sound absorbing panel 100c but also the vibration damping performance can be achieved.

(Manufacturing process of sound absorbing panel)
FIG. 7 is a schematic diagram illustrating an example of a manufacturing process of the sound absorbing panel 100.

  As shown in FIG. 7, the manufacturing apparatus 900 for the sound absorbing panel 100 includes an extrusion molding machine 910 and an extrusion mold 920 that include a material input unit. The extrusion die 920 includes a core moving unit 930 for changing the discharge amount.

  The core moving part 930 can change the gap of the die lip by moving the core up and down by providing a taper difference between the die inner edge and the core outer edge of the die lip. As a result, the discharge amount can be changed.

  The main body 110 of the sound absorbing panel 100 may be formed using any polymer material such as polyethylene or vinyl chloride, which is a general-purpose resin, in the extruder 910 including the material input unit.

  Specifically, when vinyl chloride and carbon dioxide gas are charged into an extruder 910 including a material charging part, the main body part 110 can be formed from a resin foam. In this case, the thermal conductivity is 0.09 W / mK, and not only the sound absorbing performance of the sound absorbing panel 100 but also the heat insulating performance can be achieved.

  Further, specifically, when a material mixed with vinyl chloride and fly ash is fed into an extruder 910 including a material feeding part, the specific gravity after molding is 1.9, and according to the weight rule, the sound absorbing panel 100 In addition to sound absorption performance, sound insulation performance can be achieved.

  As described above, since the sound absorbing panels 100, 100a,..., 100c according to the present invention have different volumes of the hollow portions 210,. In addition, since the slits 310,..., 340 have different widths and a plurality of combinations thereof are formed, the frequency band capable of sound absorption can be further widened by one sound absorbing panel 100, 100a,. Therefore, the sound absorption effect can be enhanced.

  Moreover, since the volume of the cavity 240 of the sound absorbing panel 100a changes along the z direction and the width of the slit 330 also changes along the z direction, the frequency band capable of absorbing sound can be further expanded.

  Moreover, when the main-body part 110 consists of foamed resin, not only a sound absorption effect but a heat insulation effect can be acquired, and when it consists of mixed resin whose specific gravity becomes 1.8 or more, sound-insulation performance can be improved.

  Furthermore, the sound absorbing panels 100, 100a,..., 100c according to the present invention can provide an effective soundproofing effect when used as a wall, floor, ceiling, or the like in construction.

In addition, you may use another board, a sheet | seat, wallpaper, etc. instead of the member 520. FIG. As a result, the slits 310 to 340 can be made inconspicuous. In particular, when the slits 310 to 340 are disposed in the room, the slits 310 to 340 can be hidden.
Furthermore, instead of adhesive bonding, an arbitrary method may be used as a bonding method such as a screw or a nail.
In addition, you may bury the porous material etc. which were represented by the glass wool etc. in the cavity parts 210--240. Further, even if a panel or sheet that exerts effects such as heat insulation, sound insulation, vibration suppression, and sound absorption is bonded to the surface (surface in the -y direction) of the sound absorbing panels 100, 100a, to 100c where no slit exists. Good.

  In the present invention, the z direction corresponds to the “longitudinal direction”, the sound absorbing panels 100, 100a,..., 100c correspond to the “sound absorbing panel”, the main body 110 corresponds to the “main body”, and the hollow portions 210,. , 250 corresponds to the “cavity portion”, the surface in the y direction corresponds to “one side”, the slits 310 to 340 correspond to “slits”, and the cavity portions 250 to 290 correspond to “a plurality of spaces”. , The communication ports 410 to 440 correspond to “communication slits”, the extrusion process from the extrusion die 920 corresponds to the “extrusion process”, and the process from the core moving unit 930 for changing the discharge amount Corresponds to the “core moving step”, and the step of FIG. 7 corresponds to the “sound absorbing panel manufacturing method”.

  Moreover, although one preferable embodiment of this invention is as above-mentioned, this invention is not restrict | limited only to it. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

100, 100a, ..., 100c Sound absorbing panel 110 Main body part 210, ..., 240 Cavity part 310, ..., 340 Slit 520 Member 250, ..., 290 Cavity part 410, ..., 440 Communication port 910 Extruder including material input part 920 Extrusion mold 930 Core moving part

Claims (16)

A sound absorbing panel having a longitudinal direction,
A plurality of hollow portions formed in the main body and having different volumes;
Including a slit that communicates only from one side of the main body from the hollow portion,
The slits have different widths;
A sound absorbing panel in which a plurality of combinations of the volume of the cavity and the width of the slit are formed.   The sound absorbing panel according to claim 1, wherein a volume of the hollow portion changes along the longitudinal direction.   The sound absorbing panel according to claim 1, wherein a width of the slit changes along the longitudinal direction. A sound absorbing panel having a longitudinal direction,
A cavity formed inside the body,
Including a slit that communicates only from one side of the main body from the hollow portion,
The hollow portion is a sound-absorbing panel whose volume changes along the longitudinal direction.   The sound absorbing panel according to claim 4, wherein a width of the slit changes along the longitudinal direction. A plurality of the hollow portions are formed and have different volumes.
The slits have different widths;
The sound absorbing panel according to claim 4 or 5, wherein a plurality of combinations of the volume of the hollow portion and the width of the slit are formed. A sound absorbing panel having a longitudinal direction,
A cavity formed inside the body,
Including a slit that communicates only from one side of the main body from the hollow portion,
The slit is a sound-absorbing panel, the width of which varies along the longitudinal direction.   The sound absorbing panel according to claim 7, wherein a volume of the hollow portion changes along the longitudinal direction. A plurality of the hollow portions are formed and have different volumes.
The slits have different widths;
The sound absorbing panel according to claim 7 or 8, wherein a plurality of combinations of the volume of the hollow portion and the width of the slit are formed.   The sound absorbing panel according to claim 1, wherein the main body is made of a foam material.   The sound-absorbing panel according to claim 1, wherein a mixed resin having a specific gravity of 1.8 or more is used for the main body.   The sound absorbing panel according to any one of claims 1 to 11, wherein a resin layer different from the main body is provided on a surface different from the opening of the slit.   The sound absorbing panel according to any one of claims 1 to 12, wherein at least one of the plurality of cavities is partitioned into a plurality of spaces.   The sound absorbing panel according to any one of claims 1 to 13, wherein the plurality of spaces have communication slits between adjacent spaces, and the positions of the facing slits are different. It is a manufacturing method of a sound-absorbing panel given in any 1 paragraph of Claims 1 thru / or 14,
A method for producing a sound-absorbing panel, comprising a step of extruding a polymer material that forms a body having a cavity and a slit. The extrusion process includes
The method for manufacturing a sound-absorbing panel according to claim 15, comprising a core moving step of changing a volume of the hollow portion and a width of the slit.

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