KR20020010448A - Acoustic absorption panel - Google Patents

Abstract

PURPOSE: To provide a sound absorbing panel capable of preventing generation of dewing in a sound absorbing material in the sound absorbing panel formed by arranging the sound absorbing material between a perforated plate and a sound insulating plate. CONSTITUTION: The sound absorbing material 65 is arranged between the perforated plate (a) and the sound insulating plate b. A heat insulating layer 66 composed of a moisture impermeable construction material is formed on the sound insulating plate b side of this sound absorbing material 65. The sound insulating plate is arranged on the outdoor side, and the perforated plate is arranged on the indoor side, and can be arranged as an outer wall. When an outdoor air temperature becomes lower than an indoor room temperature, steam in the air reaching the inside of the sound absorbing material via a hole of the perforated plate is prevented from entering the sound insulating plate side rather than the heat insulating layer by the heat insulating layer. At this time, steam in the indoor side air does not reach up to a surface of the sound insulating plate cooled by outside air. A temperature drop in the sound absorbing material on the perforated plate side being the indoor side more than the heat insulating layer is prevented by the presence of the heat insulating layer. Thus, generation of the dewing in the sound absorbing material can be prevented.

Description

Sound Absorption Panel {ACOUSTIC ABSORPTION PANEL}

The present invention relates to a sound absorbing panel that can be suitably used as an outer wall material of a facility in which noise such as a factory is generated.

In a facility where noise is generated, such as a factory, a sound absorbing panel is employed on the outer wall to reduce noise in the facility and to prevent noise outside the facility. As a sound absorbing panel B conventionally used, as shown in FIG. 16, the perforated plate (a) which consists of a metal hoop material, and the sound insulation board (b) which consists of a metal hoop material (b) The sound absorbing material 65 which consists of inorganic fiber materials, such as rock wool and glass fiber, is arrange | positioned between (). This sound absorption panel B is arrange | positioned so that the sound insulation board b may be in the outer side of a facility, and the perforated plate a may become the inside of a facility, and is used as an outer wall.

When such a sound absorption panel B is used as an outer wall, the noise in facilities, such as a factory, is transmitted to the sound absorption material 65 in the hole c formed in the perforated plate a, and the noise is absorbed as the sound absorption material 65. Is absorbed. As a result, sound is reflected from the sound absorbing panel b, and noise is not transmitted to the outside of the facility through the sound absorbing panel B, so that the noise can be reduced within the facility and the leakage of the noise to the outside can be achieved. have.

However, especially in winter, since the temperature inside facilities, such as a factory, becomes higher than the outdoor temperature, dew condensation was easy to generate | occur | produce on the sound insulation board b side of the sound absorption material 65 of the sound absorption panel B. That is, air in the facility penetrates into the sound absorbing material 65 through the holes c of the perforated plate a, reaches the surface of the sound insulating plate b, and the soundproof plate in which water vapor contained in the air is cooled by outside air ( Condensation occurs in contact with b). The occurrence of such condensation causes corrosion, and there is a problem in that the sound insulating plate b and the sound absorbing material 65 are peeled off by this corrosion and the durability of the sound absorbing panel B is lowered.

This invention is made | formed in view of the said point, The objective is providing the sound absorption panel which can prevent generation | occurrence | production of the dew condensation in a sound absorption material in the sound absorption panel formed by arrange | positioning the sound absorption material between a perforated plate and a sound insulation plate. It is.

In the sound absorbing panel according to claim 1 of the present invention, the sound absorbing material 65 is disposed between the perforated plate a and the sound insulating plate b, and at the sound insulating plate b side of the sound absorbing material 65, It is characterized by forming a heat insulating layer 66 made of a material that does not pass.

The invention of claim 2 is characterized in that the heat insulating layer 66 is formed of a foamed resin in the sound absorbing panel according to claim 1.

According to a third aspect of the present invention, in the sound absorbing panel according to claim 1 or 2, the sound absorbing material 65 is formed of an inorganic fiber material.

1 is a cross-sectional view showing a sound absorbing panel according to an embodiment of the present invention.

2 is a partially broken perspective view of the sound absorbing panel.

3 is a schematic explanatory view showing a production line of the sound absorbing panel of the present invention.

4 is a perspective view showing one end of a sound absorbing panel.

Fig. 5 is a broken perspective view showing the drilled hole formed in the metal shell.

6 is a broken perspective view showing another example of the drilled hole formed in the metal shell.

7 (a) and 7 (b) are broken partial perspective views showing both ends and the bent shape of the metal shell in the width direction.

It is a schematic explanatory drawing which shows the manufacturing line of the sound absorption panel of this invention.

9 (a) to 9 (c) are schematic cross-sectional views showing the operation of the first adhesive coating device.

10 (a) to 10 (c) are schematic cross-sectional views showing the operation of the molding material applying apparatus.

11 (a) to 11 (c) are schematic diagrams illustrating a production line of a sound absorbing panel and a porous reloading device.

It is a schematic sectional drawing which shows the removal process of the adhesive agent by an absorber.

13 (a) to 13 (d) are schematic diagrams showing a cutting device in a production line of a sound absorbing panel.

14 (a) to 14 (f) are schematic explanatory diagrams showing cut / end bending processes in a production line of a sound absorbing panel.

15 is a schematic cross-sectional view showing another example of the first adhesive coating device.

It is a partially broken perspective view which shows the conventional sound absorption panel.

* Description of the symbols for the main parts of the drawings *

A: Sound absorption panel, 1: End holding part, 1a: Connection piece

a: hole plate, b: sound insulation plate c: hole

d: porous material e: inorganic core material

65: Sound absorbing material 66 Heat insulation layer 91a: Resonance film member

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in Figs. 1 and 2, in the sound absorbing panel A of the present embodiment, the sound insulating plate b and the hole plate a are formed by molding a metal hoop material. A plurality of holes (c) that are opened (opened) on the front and back surfaces are provided over the entire surface. In order to obtain the high sound absorption performance of the oblique incident sound, the hole plate a has a plate thickness of 0.5 to 1.0 mm, a hole diameter of 3 to 10 mm, and a porosity of 30 to 60. It is preferable to set it as the range of%.

Moreover, the connection piece 1a for panel connection is formed in the both sides of the sound insulation board b and the perforated plate a by bending shaping | molding. The sound absorbing material 65 and the inorganic core material e are arrange | positioned between this sound insulation board b and the hole plate a.

The inorganic core material e is disposed in the region between the sound insulating plate b and the hole plate a at both end portions of the sound absorbing panel A. FIG. Here, the inorganic core material e is held inside the connecting piece 1a, and the connecting piece 1a also has a function as the end holding piece 1 for core material holding the inorganic core material e.

The sound absorbing material 65 is filled between the sound insulating plate b and the perforated plate a in the region between the inorganic core materials e disposed at both end portions, and is formed of an inorganic fiber material such as rock wool or glass fiber. It can be comprised as the porous material d which becomes.

In this invention, the heat insulation layer 66 which consists of a material which does not let water (water vapor) pass is formed in the sound insulation board (b) side of the sound absorption material 65. As shown in FIG. Here, in forming the heat insulation layer 66, the molding material for shape | molding the heat insulation layer 66 is arrange | positioned at the sound insulation board (b) side of the sound absorption material 65, and a part or all of this molding material is absorbed. 65, and by forming a molding material in this state to form a heat insulating layer 66, the heat insulating layer 66 can be formed integrally with the sound absorbing material (65). In this case, the interface between the sound absorbing material 65 and the layer of the heat insulation layer 66 is not formed, and peeling between layers can be prevented and the strength of the sound absorbing panel A can be increased. Moreover, this heat insulation layer 66 can also have a function of the adhesive agent which ensures adhesion | attachment of the sound absorbing material 65 and a sound insulation board b.

The sound absorption panel A which has the above structure is arrange | positioned so that the sound insulation board b may be in the outdoor side, and the perforated plate a may be in the indoor side, and it is used as an exterior wall of facilities, such as a factory. do. At this time, the noise generated inside the facility is transmitted to the sound absorbing material 65 through the hole c of the perforated plate a of the sound absorbing panel A, and the sound absorbing material 65 absorbs this noise, so that the noise is reduced. By preventing reflection from the sound absorbing panel A, the noise in the room may be reduced, and noise may be suppressed from being transmitted to the outdoor through the sound absorbing panel A, thereby reducing noise leakage to the outdoor.

In addition, especially in winter, when the outdoor temperature is lower than the room temperature of the room, water vapor in the air reaching the sound absorbing material 65 through the hole c is formed by the insulating layer 66 than the heat insulating layer 66. Since the invasion to the sound insulating plate b side is prevented, water vapor in the air on the room side cannot reach the surface of the sound insulating plate b cooled by the outside air. In addition, the presence of the heat insulation layer 66 prevents the temperature decrease of the sound absorbing material 65 on the side of the porous plate a located on the interior side of the heat insulation layer 66. As described above, according to the sound absorbing panel of the present invention, it is possible to provide good heat insulating properties between the outdoors and the room, and at the same time, water vapor contained in the indoor air effectively prevents condensation in the sound absorbing material 65 of the sound absorbing panel. can do.

In forming the heat insulation layer 66, it is particularly preferable to use a material having an independent bubble, such as a foamed resin (plastic foam) such as foamed polyurethane, foamed isocyanurate, foamed phenol, or the like. Since a material such as a foamed resin having an independent bubble has a high heat insulating property while preventing the passage of water vapor, when the material is impregnated into the sound absorbing material 65 to form the heat insulating layer 66, it is highly waterproof and heat insulating. It is particularly preferable to effectively form a heat insulating layer 66 having a structure, and effectively prevent the generation of condensation in the sound absorbing material 66 as a result.

When the heat insulating layer 65 is formed of a foamed resin, as a molding material for molding the heat insulating layer 66, a foamed molding material for molding a foamed resin such as foamed polyurethane, foamed isocyanurate, foamed phenol, or the like (plastic foam) Using a mixer), the foamed molding material is placed on the sound insulation plate (b) side of the sound absorbing material 65, and part or all of the foamable molding material is impregnated into the sound absorbing material 65. It foams by heating, and the heat insulation layer 66 is formed. In this manner, an integrally molded article in which the heat insulation layer 66 is strongly bonded to the sound absorbing material 65 can be obtained.

The sound absorbing material 65 used for the sound absorbing panel A is preferably formed of inorganic fiber material such as rock wool or glass fiber. In this case, the sound absorbing material 65 can be given high sound absorption performance. Moreover, in forming the sound absorbing material 65 and the heat insulating layer 66 integrally by impregnating the sound absorbing material 65 with the molding material for forming the heat insulating layer, the gap between the fibers can be easily impregnated with the molding material. The heat insulation layer 66 can be formed easily.

In manufacturing the sound absorbing panel A as described above, the thickness of the sound absorbing material 65 and the heat insulating layer 66 is appropriately set. For example, the thickness of the sound absorbing material 65 is 5 cm, and the heat insulating layer 66 is formed. It is preferable to form the thickness of 5 to 10 mm.

Hereinafter, the manufacturing process of the sound absorption panel A which concerns on this invention is demonstrated concretely.

3 is an explanatory diagram of a continuous production line of the sound absorbing panel A. FIG. At the beginning of the production line, the uncoilers 2a and 2b are provided vertically as a delivery device 2, and the metal shell of the hoop material supplied from the upper uncoiler 2a is formed on the front and back surfaces. It is a perforated plate (a) formed by providing a plurality of drilled holes (c) over the entire surface. Roll molding is performed to both end portions in the width direction of the porous plate a by a bending device 3 described later. For example, one side end part of the hole plate a can be roll-shaped in the shape as shown in FIG.

In addition, the metal shell of the hoop material supplied from the lower uncoiler 2b is a sound insulation board b which has sound insulation. Perforation holes 8a and 8b as shown in FIG. 5 are formed in the both ends of the sound insulation board b in the width direction by the perforation apparatus 9 provided in the transmission start part. In FIG. 5, arrow Y is the transmission direction of the sound insulation board b. The perforation holes 8a and 8b are used for cutting separation of the preceding panel body portion A and the subsequent panel body portion A '. Moreover, as shown in FIG. 6, the perforation hole 8a, 8b may form one side in substantially step shape, or may be formed in substantially mountain shape.

The bending apparatus 3 is arrange | positioned similarly to the above also during the conveyance of the sound insulation board b. By this bending apparatus 3, the core material holding piece 1 for holding the inorganic core material e mentioned later is roll-molded. This core material holding piece 1 consists of a connection piece 1a for connecting adjacent panels. An example of the molding shape is shown in Fig. 7A and 7B.

On the downstream side of the bending device 3, the first adhesive coating device 10 is disposed. The adhesive agent 51 is apply | coated to the both ends of the sound insulation board b of the width direction by this 1st adhesive coating apparatus 10. As shown in FIG. On the downstream side of the first adhesive application device 10, a core insert portion 21 for supplying a hard inorganic core material e such as calcium silicate is provided at both ends in the width direction of the panel. Then, after the adhesive is applied to both ends in the width direction of the sound insulating plate b in the first adhesive coating device 10, a long, thin paper-like paper is formed in the transfer direction of the sound insulating plate b to the portion to which the adhesive is applied. The inorganic core material (e) is loaded and bonded.

On the downstream side of the core inserting portion 21, a filler supply device for supplying a filler 60 formed of glass cloth, nonwoven fabric or the like to the lower surface of the hole plate a (in Fig. 3, the lower surface of the hole plate a) ( Not shown) is installed. The filler 60 prevents the fiber from falling off from the porous material d formed of an inorganic fiber material such as rock wool or the like described later.

In addition, since the adhesive 51 applied to the lower surface of the hole plate a is prevented from leaking by the second adhesive coating device 24 described later in the hole c of the hole plate a, the protective sheet ( 50 is supplied to the upper surface of the perforated plate a by the first protective sheet supply device 52. That is, the first protective sheet supply device, as shown in Figure 8, is installed above the porous plate (a), and wound around the protective sheet 50 formed of a synthetic resin film or kraft paper (kraft paper) A pair of upper and lower sides to which the protective sheet 53 to be retained, the protective sheet 50 drawn out from the protective sheet 53, and the hole plate a are pressed together and press the protective sheet 50 to the upper surface of the hole plate. It consists of a pressing roll 73 of.

The protective sheet 50 is withdrawn from the protective sheet 53 by the tension of the perforated plate a to be advanced, and is sequentially attached to the upper surface of the perforated plate a, and the upper surface of the perforated plate a. The opening of the upper side of the hole (a) hole (c) can be blocked by the protective sheet (50) arranged in the. And the hole 51 (a) is apply | coated to the lower surface of the hole plate (a) in the state which closed the hole (c) with the protective sheet 50 by the 2nd adhesive coating apparatus 24 in the next process. It is possible to prevent the adhesive 51 applied to the lower surface of the lower surface from leaking to the upper surface side of the hole plate a through the hole c, thereby preventing the upper surface of the hole plate a from being contaminated by the adhesive 51. do.

On the downstream side of the supply device of the filler material 60 and the first protective sheet supply device 52, and also on the sound insulating plate b of the porous material d (the inclined portion of the conveying conveyor 17 described later) On the upstream side of 19), a molding material application device 24b for applying the second adhesive coating device 24a and the foaming molding material 67 is provided. The second adhesive coating device 24a applies the adhesive 51 to the lower surface side of the hole plate a. On the other hand, the molding material application device 24b is disposed above the sound insulation plate b, and applies the foam molding material 67 to the upper surface of the sound insulation plate b.

As shown in Figs. 9A to 9C, the second adhesive coating device 24a is formed in the nozzle hole 26 when the coating nozzle 25 is brought into contact with the hole plate a to be conveyed. Receiving the ejection pressure of the adhesive 51 sprayed at a predetermined pressure, the coating nozzle 25 is slightly retracted (falled) from the lower surface of the hole plate a to form a slight gap E with respect to the hole plate a. It is formed in the upper surface of the application | coating nozzle holding means 27 and the application | coating nozzle 25, The roll-shaped evenness for apply | coating the adhesive 51 uniformly on the lower surface of the perforated plate a at the said space | interval E at the surface. The opening 28 is provided. In Fig. 9, 29 is a cylinder, 30 is a spring and 31 is a support roll.

According to the second adhesive coating device 24a having such a configuration, the coating nozzle 25 is brought into contact with the lower surface of the upper hole plate a, and the adhesive 51 ejected from the nozzle hole 26 is the hole plate. The application nozzle 25 retreats from the hole plate a by the pressure which is received by (a) and the support roll 31, and the predetermined space | interval E which originates in a ejection pressure between the hole plate a. ). At this interval E, the adhesive 51 ejected from the nozzle hole 26 is uniform in the shape of a face in the roll-shaped portion 28 formed in the coating nozzle 25 and in a thickness corresponding to the interval E. To the lower surface of the perforated plate (a). According to this method, application | coating of the adhesive agent 51 to the lower surface of the conveyed hole plate a can be performed uniformly and efficiently. In addition, by adjusting the pressure for ejecting the adhesive 51 from the nozzle hole 26, the interval E from which the coating nozzle 15 is separated from the hole plate a is suppressed, and the thickness of the coating thickness of the adhesive 51 is reduced. The setting can be easily changed.

As shown in Figs. 10A to 10C, the molding material application device 24b has a nozzle hole 26 in the case of contacting the sound insulating plate b for conveying the coating nozzle 25. The coating nozzle 25 is retracted slightly (up) from the upper surface of the sound insulation plate b by receiving the ejection pressure of the foamed molding material 67 which is ejected at a predetermined pressure at a predetermined interval (E). Is formed on the lower surface of the coating nozzle 25 and the coating nozzle holding means 27 for forming the foaming material. The foam molding material 67 is uniformly applied to the sound insulating plate b for the gap E. And a rolled portion 28 is provided. In the figure, reference numeral 29 is a cylinder, 30 is a spring, and 31 is a support roll.

According to the coating device 24b of the foam molding material 67, the foam molding material 67 is blown out of the nozzle hole 26 by bringing the coating nozzle 25 into contact with the upper surface of the lower sound insulating plate b. As the water pressure received by the sound insulating plate b and the supporting roll 31, the coating nozzle 25 is retracted from the sound insulating plate b, and the predetermined pressure caused by the ejection pressure between the sound insulating plate b is To form an interval (E). The foamed molding material 67 ejected from the nozzle hole 26 at such intervals E is formed in the roll-formed portion 28 formed in the coating nozzle 25 in a plane shape and in a thickness corresponding to the distance E. Evenly apply to the upper surface of the sound insulation plate (b). According to this method, application of the foamable molding material 67 to the upper surface of the sound insulating plate b to be conveyed can be performed evenly and effectively. In addition, since the pressure for ejecting the foamable molding material from the coating nozzle 25 is adjusted, the interval E from which the coating nozzle 25 is separated from the sound insulating plate b is controlled to control the coating thickness of the foaming molding material 67. The setting of can be changed easily.

Next, a porous material d formed of an inorganic core material such as rock wool or the like is formed in the space between the porous plate a and the sound insulating plate b between the inorganic core material e adhered to both ends in the width direction of the panel. Reload. Loading of the porous material d is performed at the lower end of the inclined portion 19 of the transport conveyor 17. In loading between the inorganic core materials (e) bonded to both ends in the width direction of the porous material (d), the sound-perforated plate (a) and the sound insulation are made so that the axial direction of the fibers of the porous material (d) faces the thickness direction of the completed panel. It is loaded between the plates b.

In loading the porous d, for example, it is preferable to use the porous material loading device 4 as shown in Figs. 11A to 11D. Fig. 11A is a schematic view of the loading apparatus, and Figs. 11B to 11D are side views of part of the loading apparatus viewed from different directions, respectively. At the beginning of the loading apparatus 4 (the upper left part of Fig. 11 (a)), a roller conveyor 11 for storage is arranged, and plate-shaped inorganic fiber plates D stacked in multiple layers are placed one by one. 11) is transferred to the transfer machine.

On the surface of each inorganic fiber board D, the membrane member 91 is stuck over the whole surface. As a specific example of the membrane member 91, a plastic film or a plastic sheet such as polyvinyl fluoride or polyethylene, a thin sheet material such as a high density glass cloth or a nonwoven fabric can be used. The membrane member 91 is partially adhered by applying an adhesive 51 in a point shape to the surface of the inorganic fiber plate D, and as shown in FIGS. 1 and 2, between adjacent porous materials d. It is fitted as the resonance film member 91 and functions as a resonance film.

The conveyance direction of the inorganic fiber board D by the roller conveyor 11 substantially corresponds to the axial direction of the inorganic fiber in the inorganic fiber board D. As shown in FIG. The one sheet of inorganic fiber sheet D conveyed to the conveyer 12 is conveyed in a direction orthogonal to the conveying direction of the roller conveyor 11, to a cutter 6 having a plurality of slitters 13. Are sent and cut into paper shapes here. At this time, the cutting direction by the slitter 13 is substantially perpendicular to the axial direction of the fibers in the inorganic fiber sheet D. FIG. In this way, several sheets of paper-like porous material (d) can be obtained from one sheet of inorganic fiber sheet (D).

On the downstream side of the slitter 13, a conveyor 61 having a stopper 14 is arranged, and the paper-like porous material d supplied from the cutter 6 is received by the stopper 14. And horizontally conveyed in the direction shown by the arrow E in FIG. At this time, the conveyance direction by the conveyor 61 is substantially the same as the axial direction of the inorganic fiber of the paper-like porous material d. Each of the horizontally conveyed paper-like porous material d is rotated 90 degrees by the reversing means 7 having the reversing bar 15 provided at the end of the conveyor 61. Thereby, the axial direction of the inorganic fiber of the paper-like porous material d becomes a direction perpendicular to the conveyance direction by the conveyor 61. As shown in FIG. The paper-like porous material d rotated by 90 degrees is conveyed to the transfer conveyor 16 arranged adjacent to the inverting means 7. The paper-like porous material d transferred to the conveying conveyor 16 is aligned with, for example, 10 sheets by the side guide 22 and the elevating stopper 23, and the paper-like porous material is conveyed by the conveying conveyor 17. It is conveyed while integrating as an aggregate. At this time, the above-mentioned resonant membrane member 91a is disposed between the adjacent porous materials d.

The conveying conveyor 17 is comprised from the horizontal part 18 and the inclination part 19, and the integrated aggregate (for example, ten sheets) of the porous material d integrated 5 in the downstream side along the inclination part from the horizontal part It transfers so that it may shift | deviate every one, and it can be loaded between the inorganic core materials e which are already adhere | attached with the adhesive agent 51 on the sound insulation board b continuously. Further, the tip of the inorganic core material (e) is to be brought into contact with and filled with the preceding inorganic core material (e). By filling in this way, the butt line 20 of the porous materials d is avoided from being matched linearly, and the butt line 20 is shifted | deviated, and the part with weak bending strength arises in a panel product. To avoid doing so.

In the vicinity where the porous material (d) is supplied between the hole plate (a) and the sound insulation plate (b), the protective sheet which is attached to the upper surface of the hole plate (a) by the first protective sheet supply device 52 50 is removed by the first protective sheet peeling device 54 (see FIG. 8). The 1st protective sheet peeling apparatus 54 has the winding roll for winding the protective sheet 50, and is installed above the hole plate a in the downstream of the press roll 55. As shown in FIG. The press roll 55 presses the porous plate a from the upper side through the protective sheet 50 to the upper surface of the porous material d, thereby allowing the adhesive 51 applied to the lower surface of the porous plate a to be porous. It has a function to penetrate the ash (d). Since the 1st protective sheet peeling apparatus 54 winds up and removes the protective sheet 50 from the perforated plate a immediately after the application | coating process of the adhesive agent 51, it penetrates into the hole c of the perforated plate a. The hole 51 and the protective sheet 50 are not completely adhered by the adhesive 51, and the protective sheet 50 can be easily peeled from the hole plate a.

In addition, as shown in FIG. 8, on the downstream side of the first protective sheet peeling apparatus 54, an absorbent 56 formed of an absorbent paper or the like on the upper side of the hole plate a is roll-shaped to the absorbent material supply roll 57. It is wound up, and the absorber 56 is unwound in the rolled state and is arrange | positioned at the upper surface of the perforated plate a. The absorber 56 disposed on the upper surface of the hole plate a is pressed onto the upper surface of the hole plate a as a soft roll 58. When the absorbent material 56 is pressed to the upper surface of the hole plate a as the soft roll 58 as described above, the absorbent material 56 enters through the opening of the upper surface of the hole c as shown in FIG. The adhesive 51 filled in the hole c is absorbed and removed by the absorbent material 56 that enters the hole c. The absorber 56 which absorbed this adhesive 51 is wound up again by the winding roll 59, and is removed from the upper surface of the perforated plate a.

In this way, the absorbent material 56 absorbs and removes the excess adhesive 51 filled in the hole c, so that the adhesive 51 hardens in the hole c and does not block the hole c. It is possible to prevent the degradation of the sound absorbing performance of the sound absorbing panel generated by clogging the holes c.

Further, on the downstream side of the take-up roll 59, as shown in FIGS. 3 and 8, a second protective sheet supply device 70 for supplying the second protective sheet above the hole plate a is provided. . The second protective sheet supply device 70 is formed in the same manner as the first protective sheet supply device 52 described above, and has a protective seat 71 for winding and holding the protective sheet 50. The protective sheet 50 is withdrawn from the protective sheet 71 by the tension of the perforated plate a to proceed, and is sequentially attached to the upper surface of the perforated plate a, and the upper surface of the perforated plate a. The upper opening of the hole c of the hole plate a is blocked by the protective sheet 50 arranged. The hole plate a is transferred to the molding apparatus of the next step in a state where the hole c is blocked as the protective sheet 50.

The molding apparatus 5 includes a double conveyor in which the upper molding mold 34 and the lower molding mold 35 are rotatably formed in a conveyor shape, and a heater for heating the upper molding mold 34 and the lower molding mold 35. (Not shown). A panel laminate in which the filler 60, the porous material d, and the inorganic core material e are loaded between the porous plate a and the sound insulating plate b includes an upper molding mold 34 and a lower molding mold 35. It is pulled in and sandwiched between and pressurized by the upper shaping | molding mold 34 and the lower shaping | molding mold 35, and it heats and bonds integrally.

In this heating and pressing step, the inorganic core material (e) is bonded with the perforated plate (a), the sound insulation plate (b), and the adhesive 51, and the perforated plate (a) and the porous material (d) are the adhesive (51). Is bonded. In addition, the foam molding material 67 interposed between the porous material d and the sound insulating plate b is impregnated in the porous material d, and is foamed by heating, and the heat insulating layer 66 made of foamed resin. This state can be obtained by impregnating the gap in the sound absorbing material 65. Here, the porous material (d) and the sound insulating plate (b) are bonded as the foamed resin constituting the heat insulating layer 66. In addition, although the shaping | molding apparatus 5 mentioned above is used in this embodiment, a suitable design change is possible as needed.

By the way, as the molding (pressing) by the molding apparatus 5, the porous plate a and the porous material d are adhered to each other so that the adhesive 51 is pushed into the hole c, so that the adhesive 51 Although it may leak from the hole (c) to the upper surface side of the hole plate (a) and contaminate the upper forming mold (34) of the molding apparatus 5 or its periphery, according to the manufacturing apparatus of this embodiment, the hole plate (a) Since the protective sheet 50 is disposed on the upper surface of the die and is molded by the molding apparatus 5 in a state in which the hole c is closed, the adhesive sheet 51 is formed from the hole c by the protective sheet 50. It can be prevented from leaking to the upper surface side of a), it is possible to prevent the contamination of the molding apparatus or its surroundings by the adhesive 51 by the protective sheet (50).

On the downstream side of the molding apparatus 5, a second protective sheet peeling apparatus 72 is provided. The second protective sheet peeling apparatus 72 peels and rotates the protective sheet 50, which is supplied from the second protective sheet supply apparatus 70 and adheres to the upper surface of the porous sheet a, from the porous sheet a. It has the winding roll 79 wound up. In the forming step, the protective sheet 50 contaminated with the adhesive 51 can be peeled off from the hole plate a as the protective sheet peeling device 72 and wound up. The protective sheet 50 is used as needed, and the use of the protective sheet can be omitted if the adhesive 51 does not leak from the hole c. In addition, the protective sheet 50 may be formed in an endless loop (endless).

On the downstream side of the second protective sheet peeling device 72, a cutting machine such as a saw cutting machine 36 is arranged as the cutting device 43 as shown in FIG. A cutting line L shown in Figs. 7 (a) and 14 (a) and (b), the upper and lower tops 39 and 40, the upper perforated plate a and the lower sound insulating plate b and the filler (60) and the inorganic core material (e) and the porous material (d) are cut. In addition, as shown in Fig. 14C, by the pair of saws 41 and 41 provided as the cutting removing means 44, at the position R entered back and forth from the cutting position L, the upper oil The blank plate (a), the filler material (60), the inorganic core material (e), and the porous material (d) are cut and removed so as not to reach the lower sound insulating plate (b) (see Fig. 14 (d)). When removing unnecessary portions of the inorganic core material (e) and the porous material (d), application of the release agent is performed in advance in the entire region Q between the holes 8a and 8b (see FIGS. 5 and 6). Make it easy to remove the part. In this case, a release paper may be attached instead of the release agent.

The end portion of the sound insulation plate (b), from which the inorganic core material (e) and the porous material (d) of the unnecessary portion are removed, is connected to the X dimension of FIG. 5 by a cross-sectional bending machine (not shown) assembled in a line. The piece 42 is bent at the position M from which the inorganic core material e and the porous material d are removed to obtain a sound absorbing panel A (see Fig. 14 (e)). The completed sound absorption panel A is sent out by a delivery roller conveyor. Areas indicated by S and P in FIG. 5 show the cut-off portions by the saws 41 and 41. In addition, 62 of FIG. 14 (f) has shown coupling fittings for connecting adjacent sound absorption panels A. In FIG. 63 is a caulking agent, 64 is a heat insulating material like ceramic fiber.

In the above method, the inorganic core material (e) or the porous material is provided between the feeding speed of the feeding device (2) of the hole plate (a) and the sound insulating plate (b), and the top and bottom hole plates (a) and the sound insulating plate (b). In the forming apparatus 5 of the double conveyor for forming (d), the line speed to the cutting device 43 including the conveying speed is about 3 m / min, and is cut by the cutting means 43. The sound absorbing panel from which the inorganic core material (e) and the porous material (d) from which the cutting position (L) has been removed is brought into the bending means at a high speed of about 40 m / min as a feeding conveyor, and is smoothed by the bending means. Bending processing is performed at a speed.

Next, a change example of the application device 24a of the adhesive agent 51 will be described. That is, as shown in FIG. 15, the coating device 24a which concerns on this modification includes the container 80 which the adhesive agent 51 collects, the application roll 81 installed in the container 80, and rotationally driven; And a support roll 82 provided to face the application roll 81 above the application roll 81. The lower part of the application roll 81 is immersed in the adhesive 51 in the container 80. And in apply | coating the adhesive agent 51 to the hole plate a with the application | coating roll 81, in the container 80, the adhesive 51 adhered to the surface of the lower part of the application | coating roll 81 in the application roll 81 is carried out. The upper surface of the perforated plate (a) is brought into contact with the top surface of the perforated plate (a) through the protective sheet (50), and the application roll (81) is brought into contact with the bottom surface of the perforated plate (a). The adhesive 51 on the surface of the application roll 81 is transferred to the lower surface of the hole plate a. In this way, the adhesive 51 is sequentially applied to the lower surface of the hole plate a by transferring the adhesive 51 from the coating roll 81 to the lower surface of the hole plate a while conveying the hole plate a. Can be.

In addition, although the above-mentioned manufacturing process of a sound absorption panel is a case where a sound absorption panel is manufactured continuously, you may manufacture a sound absorption panel by a batch type for each process.

The sound absorbing panel according to the present invention is formed by arranging a sound absorbing material between the perforated plate and the sound insulating plate and forming a heat insulating layer made of a material that does not allow moisture to pass through the sound absorbing plate side of the sound absorbing material. In the case of arranging the perforated plates to the indoor side and installing them as exterior walls of facilities such as factories, the noise generated in the interior of the facility is transmitted to the sound absorbing material through the holes of the perforated plates of the sound absorbing panel and is absorbed there. The noise generated can be reduced.

In addition, leakage of noise generated indoors can also be effectively prevented by this sound absorbing panel. In addition, when the outdoor temperature such as winter is lower than the room temperature of the room, the water vapor in the air reaching the sound absorbing material through the hole of the perforated plate prevents the heat insulation layer from invading the sound insulation plate side than the heat insulation layer. Condensation in the sound-absorbing material that can cause water vapor in the air to reach the surface of the sound insulating plate cooled by the outside air can be prevented. In addition, the presence of the heat insulating layer can also prevent the temperature decrease of the sound absorbing material on the side of the porous plate on the room side than the heat insulating layer.

In the case where the heat insulation layer is formed of foamed resin, since the foamed resin having an independent bubble effectively prevents the passage of water vapor and provides high heat insulation, it is possible to form a heat insulation layer having high water resistance and heat insulation. It is particularly effective in preventing condensation.

In addition, when the sound absorbing material is formed of an inorganic fiber material, high sound absorption performance can be imparted to the sound absorbing material. Furthermore, in forming the heat insulating layer, the heat insulating layer is easily impregnated with a gap between the fibers of the inorganic fiber material, and the heat insulating layer is integrated with the sound absorbing material. It is easy to form, and can be improved not to mention the panel strength.

Claims (3)

A sound absorbing panel comprising a sound absorbing material disposed between a porous plate and a sound insulating plate, and a heat insulating layer made of a material that does not allow moisture to pass through the sound absorbing plate side of the sound absorbing material. The sound absorbing panel according to claim 1, wherein the heat insulating layer is formed as a foamed resin. The sound absorbing panel according to claim 1 or 2, wherein the sound absorbing material is formed as an inorganic fiber material.