JP2002099282A - Apparatus for manufacturing sound absorbing panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing a sound absorbing panel which is capable of preventing the apparatus and its surroundings from being contaminated with an adhesive when adhering a perforated plate and a porous material by the adhesive. SOLUTION: This apparatus includes a coating applicator 24a for applying the adhesive 51 to the under surface of the perforated plate a and a molding device 5 for adhering the perforated plate a coated with the adhesive 51 to the top surface of the porous material d. The adhesive 51 is applied to the under surface of the perforated plate a and this perforated plate a is placed on the porous material d, by which the perforated plate a and the porous material d may be adhered. The adhesive 51 applied on the under surface of the perforated plate a may therefore be prevented from leaking out through the holes and dropping and the contamination of the apparatus and its surroundings by the adhesive 51 in adhering the perforated plate a and the porous material d by the adhesive 51 may be averted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a sound-absorbing panel in which a porous material is filled between a perforated plate formed of a metal skin and a sound insulating plate, and more particularly, the apparatus and its periphery are contaminated with an adhesive. It is related to the technology that we try to avoid.

[0002]

2. Description of the Related Art As shown in FIGS.
A lock is provided between a perforated plate a (a part of the holes c is omitted and shown by imaginary lines) having a large number of holes c formed on the front and back surfaces and a sound insulating plate b having a sound insulating property. A sound absorbing panel A formed by filling a porous material d such as wool or glass wool is proposed.

[0003]

The perforated plate a
And the porous materials d, d... Are formed by applying an adhesive to the upper surface of the perforated plate a, and then pressing the porous material d on the upper surface of the perforated plate a so as to be bonded. When an adhesive is applied to the upper surface of the perforated plate a having a large number of holes c, or when the porous materials d, d. There is a problem that the device and its surroundings may be contaminated with an adhesive by dropping through the device.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a device and its surroundings which are used for bonding a perforated plate and a porous material with an adhesive. An object of the present invention is to provide an apparatus for manufacturing a sound-absorbing panel capable of preventing contamination.

[0005]

According to a first aspect of the present invention, there is provided an apparatus for manufacturing a sound-absorbing panel, comprising:
And a forming device 5 for bonding the perforated plate a coated with the adhesive 51 to the upper surface of the porous material d.

According to a second aspect of the present invention, in the first aspect, a protective sheet supply device 52 for adhering the protective sheet 50 in close contact with the upper surface of the perforated plate a is installed upstream of the coating device 24a. The protective sheet peeling device 54 for peeling the sheet 50 from the perforated plate a is provided downstream of the coating device 24a and upstream of the forming device 5.

According to a third aspect of the present invention, in the first or second aspect, a soft roll 58 for pressing the absorbent 56 is provided on the upper surface of the perforated plate a on the downstream side of the coating device 24a and the upstream side of the forming device 5. It is characterized by comprising.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the protective sheet supply device 70 for sticking the protective sheet 50 on the upper surface of the perforated plate a sent to the molding device 5 is applied. It is characterized in that a protective sheet peeling device 72 that is installed downstream of the device 24a and peels off the protective sheet 50 from the perforated plate a is installed downstream of the forming device 5.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 2 is an explanatory view of a continuous production line of the sound absorbing panel A. At the start end of the production line, uncoils 2a and 2b are provided as upper and lower unwinders 2a as a feeding device 2, and supply is performed from the upper uncoiler 2a. The metal outer skin on the hoop material to be formed is a perforated plate a formed by providing a large number of holes c formed on the front and back over the entire surface, and having a width by a folding device 3 provided on the way of conveyance. Both ends in the direction are roll-formed. The molding shape is shown in FIG. The perforated plate a has a thickness of 0.5 to draw out high sound absorption performance of obliquely incident sound.
~ 1.0mm, hole diameter 3 ~ 10mm, porosity 30 ~
Preferably, it is in the range of 60%. The metal shell below the hoop material supplied from the lower uncoiler 2b is a sound insulating plate b having a sound insulating property, and a punching hole is formed in a punching portion 9 provided at a feed start end at both ends in the width direction. 8
a and 8b are punched. Such punched holes 8a, 8b
Is used for cutting and separating the preceding panel body part A and the succeeding panel body part B, as shown in FIG. 4, and performs bending finishing of the sound insulating plate b at the line bending position as described later. It is. Further, as shown in FIG. 5, one side of the punched hole 8a can be formed in a substantially step shape, and one side of the punched hole 8b can be formed in a substantially mountain shape as shown in FIG.

While the sound insulating plate b is being conveyed, the folding device 3
Are disposed, and end holding pieces 1, 1 for holding a core material, which hold an inorganic core material e described later, are roll-formed by these bending devices 3. This end holding piece 1 serves as a panel connecting piece 1a for connecting a panel. The molded shape is shown in FIGS. These bending devices 3
An adhesive end coating device 10 is disposed downstream of the panel, and the adhesive is partially applied to both ends of the sound insulating plate b in the width direction of the panel by the end coating device 10. Downstream of the end coating device 10, insertion portions 21 are disposed at both ends in the width direction of the panel. In the insertion portion 21, a hard inorganic core of calcium silicate disposed at both ends in the width direction of the panel. The material e is inserted. Thus, the adhesive is applied to both ends of the sound insulating plate b in the width direction by the partial application device 10, and a strip-shaped inorganic core material e, e of calcium silicate long in the feeding direction of the sound insulating plate b is applied to the applied portion. It is loaded and can be glued.

In the downstream portion of the calcium silicate insertion portion 21, a glass cloth or a nonwoven fabric for preventing fibers from dropping from a porous material d formed of an inorganic fiber material such as a rock wool material described later is formed. The filling material 60 is placed on the lower surface (back surface) of the perforated plate a and supplied.

The sound insulating plate b is loaded by the loading device 4 with calcium silicate inorganic core materials e and e at both ends in the width direction of the panel.
A porous material d, d... Formed of an inorganic fiber material such as a rock wool material can be loaded in a central portion in the width direction of the panel. The loading device 4 for loading such porous materials d, d... Between the inorganic core materials e, e of calcium silicate sets the fiber direction of the porous material d in the thickness direction of the panel and sets the perforated plate a. And a sound insulating plate b.

As shown in FIG. 7, a cutting device 6 for cutting rock wool into strips has a receiving roller conveyor 11 at its starting end, and stacks plate-like inorganic fiber plates D to stand by. It is made to let. Inorganic fiberboard D
A film material 91 is stuck over the entire surface of the substrate. Specific examples of the film material 91 include a plastic film or a plastic sheet such as polyvinyl fluoride and polyethylene, a thin sheet material such as a high-density glass cloth and a nonwoven fabric, and the like. This film material 91 is partially adhered by applying an adhesive to the surface of the inorganic fiber board D in a dot-like manner, and as shown in FIGS. Are sandwiched between them as a resonance film material 91a to function as a resonance film.

A transfer machine 12 is disposed at the end of the roller conveyor 11 so that one inorganic fiber plate D transferred from the roller conveyor 11 can be moved and fed. At the end of the transfer machine 12 in the transfer direction, a slitter 13 constituting a main part of the cutting device 6 is disposed, and the fiber direction of the slitter 13 is the same as the feed direction of the perforated plate a and the sound insulating plate b. The inorganic fiber board D oriented in the horizontal and horizontal directions is divided in the direction perpendicular to the fiber direction so that several strip-shaped porous materials d, d... Can be cut and separated. . A resonant film material 91a formed by cutting and separating the film material 91 is adhered to the surfaces of the porous materials d.

A conveyor 61 having a stopper 14 is disposed downstream of the slitter 13.
Can be transported in the horizontal and horizontal direction substantially perpendicular to the production line as indicated by arrows. A reversing device 7 is disposed at the end of the conveyor 61. In the reversing device 7, each of the strip-shaped porous materials d transported by the conveyor 61 is converted into a porous material d by rotating the reversing bar 15, for example. Is rotated by 90 ° so that the fiber direction is oriented vertically.

Adjacent to the reversing device 7, the transfer conveyor 1
6. A side guide 22 and an elevating stopper 23 are provided. The transfer conveyor 16 transfers ten strip-shaped porous materials d, d... I can do it.
When the porous materials d, d... Are put together in this way, the resonance film material 91a is arranged to be sandwiched between the adjacent porous materials d, d.

The transport conveyor 17 is composed of a horizontal portion 18 and an inclined portion 19, and collects ten porous materials d, d,... Above the production line and downstream along the production line. The inorganic material of calcium silicate already attached by an adhesive on the sound insulating plate b which is continuously fed in the production line while being transported so as to be shifted one by one and flowing down at the inclined portion 19. Core material e,
It can be loaded between e. In this case, the tips of the inorganic core materials e, e.
e ... so that it can be packed. By such packing, the butting edges 20 of the porous members d and d are prevented from being aligned in the width direction of the panel, and the butting edges 20 are shifted.
It is designed to avoid the occurrence of parts having low bending strength in the product.

The place where such a porous material d of rock wool is inserted into the sound insulating plate b (the inclined portion 19 of the conveyor 17).
The coating devices 24a and 24b are disposed in the upstream part of the lower end of the perforated plate a, and it is possible to apply an adhesive in advance to each of the lower surface (back surface) of the perforated plate a and the upper surface (back surface) of the sound insulating plate b. The first protective sheet supply device 5 is provided upstream of the coating devices 24a and 24b and above the perforated plate a.
2 are installed. The protective sheet supply device 52 includes a protective sheet roll 53 for winding and holding a protective sheet 50 formed of a synthetic resin film, kraft paper, or the like, a protective sheet 50 pulled out from the protective sheet roll 53, and a perforated plate a. And a pair of upper and lower pressing rollers 73 that press the protective sheet 50 against the upper surface of the perforated plate a, and adhere and adhere the protective sheet 50 therebetween.

The protective sheet 50 is pulled out from the protective sheet roll 53 by the tension of the perforated plate a, and is successively removed.
The protective sheet 50 disposed on the upper surface of the perforated plate a closes the opening above the hole c of the perforated plate a. Then, an adhesive 51 is applied to the lower surface of the perforated plate a in the next step in a state where the holes c are closed by the protective sheet 50, so that the perforated plate a
Can be prevented from leaking to the upper surface of the perforated plate a through the hole c.
1 prevents the upper surface of the perforated plate a from being soiled.

A coating device is provided downstream of the protective sheet 50 and upstream of the location where the porous material d of rock wool is inserted into the sound insulating plate b (the lower end of the inclined portion 19 of the conveyor 17). 24a and 24b are provided. As shown in FIG. 8, the coating device 2 above the porous material d being conveyed
4a, when the application nozzle 25 is brought into contact with the perforated plate a to be conveyed, the application nozzle 25 receives the ejection pressure of the adhesive 51 ejected from the nozzle hole 26 at a predetermined pressure, and causes the application nozzle 25 to perforate the plate a.
Nozzle holding means 27 for slightly retracting from the lower surface of the nozzle to form a slight gap E with respect to the perforated plate a;
5 formed on the upper surface of the adhesive 5 in the gap.
1 and a roll-shaped leveling portion 28 for applying the adhesive 51 in a planar manner to the lower surface of the perforated plate a. 2 in the figure
9 is a cylinder, 30 is a spring, and 31 is a receiving roll.

According to such a coating device 24a, the coating nozzle 25 is brought into contact with the lower surface of the upper perforated plate a, and the adhesive 51 ejected from the nozzle holes 26 is applied to the perforated plate a and the receiving roll 31. The application nozzle 25 recedes from the perforated plate a at the receiving pressure caused by the pressure, and forms a predetermined gap E with the perforated plate a due to the ejection pressure. The adhesive 51 ejected from the nozzle holes 26 in such a gap E is made flat in the roll-shaped leveling portion 28 formed in the application nozzle 25 at a thickness corresponding to the gap E and the perforated plate a Apply to the lower surface of

A coating device 24a as shown in FIG. 9 can be used. The coating device 24a is provided with an adhesive 51
80, an application roll 81 installed in the container 80 and rotated, and a receiving roll 82 installed above the application roll 81 so as to face the application roll 81.
It is composed of The lower part of the application roll 81 is immersed in the adhesive 51 in the container 80. When applying the adhesive 51 to the perforated plate a with the application roll 81, the adhesive 51 attached to the lower surface of the application roll 81 in the container 80 is pulled upward by the rotation of the application roll 81, and the receiving roll 82 Is brought into contact with the upper surface of the perforated plate a via the protective sheet 50, and the application roll 81 is brought into contact with the lower surface of the perforated plate a.
1 is transferred to the lower surface of the perforated plate a.
In this way, the adhesive 51 is applied to the lower surface of the perforated plate a from the application roll 81 while the perforated plate a is transported in the direction of the arrow in FIG.
Is transferred, the adhesive 51 is sequentially applied to the lower surface of the perforated plate a.

As shown in FIG. 10, a coating device 24b below the conveyed porous material d is provided with a coating nozzle 25
Is brought into contact with the conveyed sound insulating plate b, the nozzle hole 2
The application nozzle holding means 27 forms a slight gap E with respect to the sound insulation plate b by slightly retreating the application nozzle 25 from the upper surface of the sound insulation plate b by receiving the ejection pressure of the adhesive 51 ejected at a predetermined pressure from 6. And a roll-shaped equalizing portion 28 formed on the lower surface of the application nozzle 25 and uniformly applying the adhesive 51 in the gap to apply the adhesive 51 to the sound insulating plate b in a planar manner.
And In the figure, 29 is a cylinder, 30 is a spring, and 31 is a receiving roll.

According to such a coating device 24b, the coating nozzle 25 is brought into contact with the upper surface of the lower sound insulating plate b, and the adhesive 51 ejected from the nozzle hole 26 is applied by the sound insulating plate b and the receiving roll 31. The application nozzle 25 retreats from the sound insulating plate b at the receiving pressure caused by being received, and forms a predetermined gap E between the application nozzle 25 and the sound insulating plate b due to the ejection pressure. The adhesive 51 ejected from the nozzle hole 26 in such a gap E is flattened at a thickness corresponding to the gap E in the roll-shaped leveling portion 28 formed in the application nozzle 25 so as to form the sound insulating plate b. Apply on top.

As described above, the coating nozzle 25 is retracted from the perforated plate a and the sound insulating plate b by the receiving pressure caused by the pressure at which the adhesive is ejected to form the gap E. Is uniformly applied to the perforated plate a and the sound insulating plate b, whereby the lower surface of the conveyed perforated plate a and the upper surface of the sound insulating plate b can be well coated. Then, by changing the pressure at which the adhesive is ejected from the nozzle holes 26, the adhesive 51 is ejected to the perforated plate a and the sound insulating plate b, so that the application nozzle 25 is connected to the perforated plate a and the sound insulating plate. The thickness of the adhesive is easily changed by changing the gap E away from b. Such coating devices 24a, 24
b can be variously changed in design.

A press roll 55 is provided on the upper side of the perforated plate a downstream of the coating devices 24a and 24b, and the press roll 55 is provided by the press roll 55 via the protective sheet 50.
Is pressed onto the upper surface of the porous material d from above, so that the adhesive 51 applied to the lower surface of the perforated plate a is made to permeate the porous material d.

The perforated plate a is located downstream of the holding roll 55.
A first protective sheet peeling device 54 is provided above the above. The protective sheet peeling device 54 is configured by a winding roll that rotates and winds the protective sheet 50 supplied from the first protective sheet supply device 52 and adhered to and adhered to the upper surface of the perforated plate a. I have. Then, in the step of applying the adhesive 51 to the perforated plate a, the protective sheet 50 soiled with the adhesive 51 that has penetrated into the holes c of the perforated plate a is peeled off from the perforated plate a by the protective sheet peeling device 54. It can be wound up.

As described above, immediately after the step of applying the adhesive 51, the protective sheet 50 is removed from the perforated plate a by the protective sheet peeling device 5.
By peeling and winding in 4, the perforated plate a and the protective sheet 50 can be completely prevented from being completely adhered by the adhesive 51 that has entered the holes c of the perforated plate a. The protection sheet 50 can be easily peeled off.

Further, on the downstream side of the protective sheet peeling device 54 and above the perforated plate a, an absorbent 5 made of blotting paper or the like is provided.
6 are supplied. The absorbent 56 is disposed on the upper surface of the perforated plate a while being unwound from the state of being wound in a roll shape. The absorbent 56 disposed on the upper surface of the perforated plate a is a. When the absorbing material 56 is pressed against the upper surface of the perforated plate a by the soft roll 58, the absorbing material 56 enters the inside from the upper surface opening of the hole c as shown in FIG. The adhesive 51 filled in the hole c by the absorbed absorbent 56
Is absorbed and removed. The absorbing material 56 that has absorbed the adhesive 51 is taken up by the take-up roll 59 and removed from the upper surface of the perforated plate a.

As described above, since the adhesive 51 filled in the hole c is sucked and removed by the absorbing material 56, the adhesive 51 is solidified in the hole c so as not to block the hole c. Thus, it is possible to prevent a decrease in the sound absorbing performance of the sound absorbing panel caused by closing the hole c.

At the downstream side of the winding roll 59, a perforated plate a
A second protective sheet supply device 70 is provided above the device. The second protective sheet supply device 70 is formed similarly to the first protective sheet supply device 52, and includes a protective sheet roll 71 that winds and holds the same protective sheet 50 as described above.

The protective sheet 50 is pulled out from the protective sheet roll 71 by the tension of the perforated plate a, and is successively removed.
The protective sheet 50 disposed on the upper surface of the perforated plate a closes the opening above the hole c of the perforated plate a. Then, the perforated plate a is sent to the molding device 5 in the next step in a state where the holes c are closed by the protective sheet 50.

Such a second protective sheet supply device 70
Is formed as a molding device 5 in the form of a double conveyor in which an upper molding die 34 and a lower molding die 35 are rotatable in a conveyor shape. And this molding device 5
Perforated plate a and sound insulation plate b between the upper mold 34 and the lower mold 35
, A filler material 60, a porous material d, d ... and an inorganic core material e, e.
Are pressed and heated by the upper molding die 34 and the lower molding die 35 so that they are bonded and integrated. In addition, such a molding device 5 can be variously changed in design.

By the forming (pressing) by the forming device 5, the adhesive 51 for bonding the perforated plate a and the porous materials d, d... Is extruded into the hole c, and the adhesive 51 is
May leak out to the upper surface side of the perforated plate a and contaminate the upper molding die 34 of the molding device 5 and its surroundings. However, in the present invention, since the protective sheet 50 is arranged on the upper surface of the perforated plate a and is molded by the molding device 5 in a state where the hole c is closed, the protective sheet 50 is formed.
0 can prevent the adhesive 51 from leaking from the hole c to the upper surface side of the perforated plate a.
Thus, contamination of the molding device and its surroundings by the adhesive 51 can be prevented.

A second protective sheet peeling device 72 is provided downstream of the forming device 5. The protective sheet peeling device 72 peels off the protective sheet 50 supplied from the second protective sheet supply device 70 and adhered to and adhered to the upper surface of the perforated plate a from the perforated plate a, and rotates and winds. It comprises a take-up roll 79 for taking. Then, the protective sheet 50 soiled with the adhesive 51 in the molding step can be peeled off from the perforated plate a by the protective sheet peeling device 72 and wound up.

The second protective sheet 50 is used as needed, and need not be used as long as the adhesive 51 does not leak from the holes c. Further, the second protective sheet 50 may be formed in an endless loop shape (endless).

At the downstream side of the second protective sheet peeling device 72, a cutting machine 36 in the form of a circular saw as the cutting means 43 as shown in FIG. 12 is provided. At the cutting position L in FIG.
At 9 and 40, the upper perforated plate a, the lower sound insulating plate b, the sealing material 60, the inorganic core materials e, e... And the porous materials d, d. Further, FIG. 6A and FIG.
As shown in (c), a pair of circular saws 41, 41 are arranged as the cutting and removing means 44, and at a position R which enters before and after the cutting position L, the upper perforated plate a and the sealing material 60 are provided. . And the porous materials d, d... Are cut so as not to reach the lower sound insulating plate b, and can be removed (see FIG. 13D). In removing such unnecessary portions of the inorganic core materials e, e .... and the porous materials d, d ..., a release agent is previously applied to the entire area between the punched holes 8a, 8b by the application device 46. Therefore, unnecessary portions can be easily removed. In this case, release paper may be stuck instead of the release agent.

Then, the end portion of the sound insulating plate b left after the unnecessary portions of the inorganic core materials e, e... And the porous materials d, d. The connecting piece 42 whose width is indicated by the X dimension of the inorganic core material e, e ...
Are bent at the position P where the porous materials d, d... Have been removed, and the sound absorbing panel A is obtained, and the product is fed out by a feed roller conveyor. C and D in the figure indicate portions removed by circular saws 41, 41. In addition, reference numeral 62 in FIG. 13 denotes a fitting for connecting the sound absorbing panels A, A. And 63 is a caulking agent, 6
Reference numeral 4 denotes a heat insulating material such as a ceramic fiber.

By the way, the delivery speed of the delivery device 2 for the perforated plate a and the sound insulating plate b, and the space between the upper and lower perforated plates a and the sound insulating plate b are filled with the inorganic core materials e, e and the porous materials d, d. The line speed up to the cutting means 43, such as the conveying speed of the forming device 5 of the double conveyor, is about 3 m / min, and after being cut by the cutting means 43, the inorganic core materials e, e at the cutting position L, The panel body part A from which the porous materials d, d ... have been removed is brought to the folding means at a high speed of about 40 m / min by a feed conveyor, and the folding means stops the panel body and bends slowly. It is done.

In the above embodiment, a method of manufacturing a sound absorbing panel in a continuous manner has been described, but a sound absorbing panel may be manufactured in a batch manner for each step.

[0042]

As described above, the method for manufacturing a sound-absorbing panel according to claim 1 of the present invention comprises a coating apparatus for applying an adhesive to a lower surface of a perforated plate, and a perforated plate on which an adhesive is applied. In order to have a molding device for bonding to the upper surface of the porous material, an adhesive is applied to the lower surface of the perforated plate, and the perforated plate is placed on the porous material to remove the perforated plate and the porous material. Adhesive applied to the lower surface of the perforated plate can be prevented from leaking through the hole and falling, and the perforated plate and the porous material are bonded with the adhesive. At this time, the device and its periphery can be prevented from being stained with the adhesive.

According to a second aspect of the present invention, in the first aspect, a protective sheet supply device for adhering the protective sheet in close contact with the upper surface of the perforated plate is installed on the upstream side of the coating device, and the protective sheet is perforated. In order to install a protective sheet peeling device that peels off from the plate on the downstream side of the coating device and on the upstream side of the forming device, after disposing a protective sheet that closes the holes on the upper surface of the perforated plate,
An adhesive can be applied to the lower surface of the perforated plate, and the adhesive applied to the lower surface of the perforated plate can be prevented from leaking through the holes and adhering to the upper surface of the perforated plate. ,
It is possible to prevent a decrease in the sound absorbing performance of the sound absorbing panel caused by closing the hole.

According to a third aspect of the present invention, in the first or second aspect, the soft roll for pressing the absorbent material on the upper surface of the perforated plate is provided downstream of the coating apparatus and upstream of the forming apparatus. After applying the adhesive to the lower surface of the plate, an absorbing material is placed on the upper surface of the perforated plate to absorb the adhesive that has penetrated into the holes, and the absorption performance of the sound absorbing panel caused by closing the holes is reduced. It is possible to prevent a decrease.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a protective sheet supply device for adhering a protective sheet in close contact with an upper surface of a perforated plate sent to a molding device is provided downstream of the coating device. And, in order to install a protective sheet peeling device that is installed on the upstream side of the forming device and peels off the protective sheet from the perforated plate on the downstream side of the forming device, a protective sheet is arranged on the upper surface of the perforated plate to close the holes. The protective sheet can prevent the adhesive from leaking from the hole to the upper surface side of the perforated plate. The surrounding area can be prevented from being contaminated.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a part showing an embodiment of the present invention.

FIG. 2 is a schematic explanatory view showing a production line of the above.

FIG. 3 is an end perspective view of the sound absorbing panel.

FIG. 4 is a cutaway perspective view showing a punched hole formed in the metal outer cover.

FIG. 5 is a cutaway perspective view showing another example of a punched hole formed in the metal outer cover.

FIGS. 6A and 6B are cutaway perspective views showing a bent shape at an end in a width direction of a lower metal shell.

FIGS. 7A and 7B show the same porous material loading device as the above, wherein FIG. 7A is a schematic plan view for explaining the operation, and FIGS. 7B, 7C, and 7D are partial side views.

FIG. 8 shows the action of applying an adhesive to the perforated plate,
(A) (b) (c) is sectional drawing.

FIG. 9 is a cross-sectional view showing another example of the action of applying the adhesive to the perforated plate.

FIG. 10 shows the action of applying an adhesive to the sound insulating plate,
(A) (b) (c) is sectional drawing.

FIG. 11 is a cross-sectional view showing the absorbing effect of the adhesive of the above absorbent material.

12A and 12B show the same cutting device, wherein FIG. 12A is a schematic side view, FIG. 12B is an explanatory view showing an operation, and FIG. 12C is a front view showing a circular saw for cutting the upper and lower perforated plates and the sound insulating plate. FIG. 2D is a front view showing a circular saw for cutting the upper perforated plate.

13 shows a production process of the above, and (a) to (f) are schematic explanatory diagrams.

FIG. 14 is a cross-sectional view showing the sound absorbing panel of the above.

FIG. 15 is a partial perspective view showing the sound absorbing panel of the above.

[Explanation of symbols]

 5 Forming device 24a Coating device 50 Protective sheet 51 Adhesive 52 Protective sheet supply device 54 Protective sheet peeling device 56 Absorbent material 58 Soft roll 70 Protective sheet supply device 72 Protective sheet peeling device a Perforated plate d Porous material A Sound absorbing panel

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Noboru Yoshida 3-2-1, Kise Minamishinmachi, Amagasaki-shi, Hyogo F-term (reference) in Daido Steel Co., Ltd. 2E001 DF02 DF04 GA42 HA21 HA32 HB01 HF00 4J040 PB01 PB02 PB03 PB04 PB08 PB24 5D061 AA22 BB02 BB24

Claims (4)

[Claims] 1. An apparatus for applying an adhesive to a lower surface of a perforated plate, and a forming device for adhering the perforated plate coated with the adhesive to an upper surface of a porous material. Manufacturing equipment for sound absorbing panels. 2. A protective sheet supply device for adhering a protective sheet in close contact with an upper surface of a perforated plate is provided upstream of the coating device, and a protective sheet peeling device for peeling the protective sheet from the perforated plate is provided by the coating device. The apparatus for manufacturing a sound absorbing panel according to claim 1, wherein the apparatus is installed downstream of the apparatus and upstream of the forming apparatus. 3. The sound-absorbing panel according to claim 1, wherein a soft roll for pressing the absorbent material on the upper surface of the perforated plate is provided downstream of the coating device and upstream of the forming device. Manufacturing equipment. 4. A protective sheet supply device for attaching a protective sheet to an upper surface of a perforated plate sent to a molding device and closely attaching the protective sheet thereto is provided downstream of the coating device, and the protective sheet is peeled off from the perforated plate. The apparatus for manufacturing a sound-absorbing panel according to any one of claims 1 to 3, wherein a peeling device is provided downstream of the forming device.