JP4955742B2 - Soundproof sheet and method for producing the soundproof sheet - Google Patents

Description

  The present invention relates to a soundproof sheet to be applied to a device that generates noise such as a compressor, and a method of manufacturing the soundproof sheet.

  2. Description of the Related Art Conventionally, for example, in a compressor housed inside an outdoor unit of an air conditioner, various sound insulation means are provided for the purpose of suppressing leakage of operating sound emitted from the compressor. As a general thing of a sound insulation means, winding a soundproof sheet around the side of a compressor is mentioned. A composite sheet obtained by laminating a sound absorbing material such as glass wool or felt and a sound insulating material such as a rubber sheet is widely used as a soundproofing material. In order to simplify the work of winding the soundproof sheet, it has been proposed to form a sound insulation bag with the soundproof sheet material and to use this to eliminate the complexity of the winding work and at the same time improve the sound insulation function. (See Patent Document 1).

  However, since the discharge pipe, suction pipe, electrical wiring, etc. are attached to the compressor, it is necessary to provide a hole for passing these through the sound insulation bag, and it is difficult to say that the shape is simple, In addition, since the soundproof material is inferior in workability, there is a problem that it takes time to create the sound insulation bag itself. Furthermore, it is necessary to accommodate the compressor in the bag while passing piping or the like through a hole provided in the sound insulation bag, and there is room for improvement in workability. For this reason, at present, a method of winding a soundproof sheet material around a compressor and fastening it with a tag pin is employed. FIG. 7 shows the soundproofing sheet material 10 used by being wound around the compressor 20 currently used. The soundproofing material 1 made of rubber sheet or the like and the sound absorbing material 2 made of glass wool, felt or the like are laminated. In the state, it is wound around the compressor 20 to prevent leakage of operation sound. In this case, in order to solve the problem that the oil penetrates into the sound absorbing material during use, the sound absorbing material 2 is covered with the aluminum foil 3 as shown in FIG. Laminated. Usually, the sound absorbing material 2 and the sound insulating material 1 are integrated by using an adhesive and applying the adhesive to almost the entire surface of the sound insulating material 1. There is also a proposal for a method of integrating the sound absorbing material 2 and the sound insulating material 1 without using an agent (see Patent Document 2).

Japanese Patent Laid-Open No. 06-42487 JP 2002-225189 A

  However, the present inventors have come to realize that the above-described conventional method has room for improvement as described below. The sound-absorbing material 2 is covered with an aluminum foil, and then the sound-absorbing material 1 is laminated on the sound-insulating material 1, and a complicated operation of integrating the sound-absorbing material 2 with an adhesive or a tag pin is required, and there is room for improvement in terms of workability. Further, as shown in FIG. 7, since it is necessary to prevent the sound absorbing material 2 from being arranged around the position where holes such as piping are provided, the shape of the sound absorbing material 2 is complicated, and the sound absorbing material is made of aluminum foil. The operation of covering 2 and laminating and integrating the sound insulating material 1 is performed manually, which also complicates the operation. Further, in this case, an adhesive is usually used, and is performed by applying the adhesive to the entire surface of the sound insulating material 1. In terms of the cost of the adhesive, and also in terms of the working environment, It is necessary to develop an integrated method that does not use an adhesive or can reduce the amount of use. As a method not using an adhesive, there is a method of integrating with a tag pin as mentioned in the prior art, but it requires a tag pin and its operation is not easy. Furthermore, as shown in FIGS. 6 and 7, conventionally, since the portion covered with the aluminum foil is limited to the portion where the oil may penetrate, the end portion of the aluminum foil having a high thickness and high hardness Is exposed, there is a risk that the operator may accidentally touch and get injured, and there is room for improvement in the sense of increasing safety.

  Accordingly, an object of the present invention is to solve the above-mentioned various problems at once, and to provide a soundproof sheet that not only secures its high soundproof function but also has excellent workability and safety in its mounting. Moreover, the objective of this invention is providing the manufacturing method of the soundproof sheet which can obtain the soundproof sheet which has the above outstanding functionalities simply and economically. Furthermore, an object of the present invention is to contribute to more efficient production of an outdoor unit or the like of an air conditioner that requires sound insulation means by providing a soundproof sheet having the above-described excellent functionality. .

  The above object is achieved by the present invention described below. That is, the present invention comprises a sound insulating sheet made of rubber or a thermoplastic elastomer, a felt-like sound absorbing sheet, and an antifouling sheet made of aluminum foil or a composite material having aluminum foil, which are laminated in this order. At the end, the sound insulating sheet and the antifouling sheet are laminated directly or via a sound absorbing sheet, and (1) the sound insulating sheet and the antifouling sheet are interposed at the peripheral end. A joined portion formed by at least one of heat melting of the sound absorbing sheet, (2) heat melting of the sound insulating sheet, and (3) adhesion by an adhesive interposed between the sound insulating sheet and the antifouling sheet. The sound insulating sheet is characterized in that the sound insulating sheet, the sound absorbing sheet, and the antifouling sheet are integrated by the joint portion.

  The following are mentioned as a preferable form of the soundproof sheet of this invention. The sound absorbing sheet is formed of a thermoplastic resin, and the sound insulating sheet and the antifouling sheet are laminated through the sound absorbing sheet up to the peripheral end of the sound insulating sheet, and the joint portion of the peripheral end is the sound absorbing sheet. The above soundproof sheet formed by welding. Further, holes or notches for piping are provided, and a sound insulating sheet and an antifouling sheet are formed by welding thermoplastic resin for constituting the sound absorbing sheet around these holes or notches. The said soundproof sheet | seat in which the junction part of the state laminated | stacked via is provided. Further, the sound absorbing sheet is formed of a material other than the thermoplastic resin, and the joint portion of the peripheral end portion of the soundproof sheet is a state in which the sound insulating sheet and the antifouling sheet are directly laminated without using the sound absorbing sheet. The above soundproof sheet.

  As another embodiment of the present invention, a sound insulating sheet made of rubber or thermoplastic elastomer, a felt-like sound absorbing sheet, and an antifouling sheet made of aluminum foil or a composite material having aluminum foil are laminated in this order. A sound insulation sheet comprising a rubber or a thermoplastic elastomer, wherein the sound insulation sheet, the sound absorbing sheet, and the antifouling sheet are integrated by a joint portion formed at a peripheral end of the sound insulation sheet. A sound absorbing sheet made of a thermoplastic resin is disposed on the sheet so as to overlap with the vicinity of the peripheral end portion of the sound insulating sheet, and further, the sound absorbing sheet is provided on the sound absorbing sheet to the vicinity of the peripheral end portion of the sound insulating sheet. The antifouling sheet is arranged so as to overlap with the sheet, and the sound insulating sheet, the sound absorbing sheet and the antifouling sheet are laminated, and on this state of the antifouling sheet At least a block having a shape capable of forming a peripheral edge is pressed in a heated state, and the thermoplastic resin constituting the sound absorbing sheet in the portion where the block is pressed is melted, so that the sound insulating sheet, sound absorbing sheet and Bonding by fouling the soiled sheet to form a joint part, and then cutting along the outer periphery of the joint part, at least at the peripheral edge of which the sound insulation sheet and the soilproof sheet are welded via the sound absorbing sheet A method for producing a soundproof sheet is provided, wherein a soundproof sheet is obtained by forming a portion and integrating a soundproof sheet, a sound absorbing sheet, and an antifouling sheet.

  As a preferred embodiment of the method for producing a soundproof sheet of the present invention, in addition to the above melting, the rubber or thermoplastic elastomer constituting the soundproof sheet is further melted, and the peripheral end portion of the soundproof sheet, the sound absorbing sheet and the antifouling sheet Examples of the method for producing the soundproof sheet for forming the joint portion in FIG.

  As another embodiment of the present invention, a sound insulating sheet made of rubber or thermoplastic elastomer, a felt-like sound absorbing sheet, and an antifouling sheet made of aluminum foil or a composite material having aluminum foil are laminated in this order. A sound insulation sheet comprising a rubber or a thermoplastic elastomer, wherein the sound insulation sheet, the sound absorbing sheet, and the antifouling sheet are integrated by a joint portion formed at a peripheral end of the sound insulation sheet. A sound absorbing sheet formed of a material other than a thermoplastic resin having a shape that does not reach the peripheral end of the sound insulating sheet is disposed on the sheet, and further, the sound absorbing sheet is disposed on the sound absorbing sheet. Place the antifouling sheet so that it overlaps to the vicinity of the end, and at the peripheral edge, make sure that the sound insulating sheet and the antifouling sheet overlap without interposing the sound absorbing sheet. The shape that can form at least a peripheral end portion formed by directly joining the sound insulating sheet and the antifouling sheet on the antifouling sheet in this state. The block having heat is pressed in a heated state, the rubber or thermoplastic elastomer constituting the sound insulating sheet in the portion where the block is pressed is melted, the sound insulating sheet and the antifouling sheet are welded, and the joint portion is formed. After that, cut along the outer periphery of the joint portion to form a joint portion where the sound insulation sheet and the antifouling sheet are directly welded to at least the peripheral end portion, so that the sound insulation sheet, the sound absorbing sheet and Provided is a method for producing a soundproof sheet, wherein a soundproof sheet is obtained by integrating a dirty sheet.

  As another embodiment of the present invention, a sound insulating sheet made of rubber or thermoplastic elastomer, a felt-like sound absorbing sheet, and an antifouling sheet made of aluminum foil or a composite material having aluminum foil are laminated in this order. A sound insulation sheet comprising a rubber or a thermoplastic elastomer, wherein the sound insulation sheet, the sound absorbing sheet, and the antifouling sheet are integrated by a joint portion formed at a peripheral end of the sound insulation sheet. A sound absorbing sheet formed of a material other than a thermoplastic resin having a shape that does not reach the peripheral end of the sound insulating sheet is disposed on the sheet, and further, the sound absorbing sheet is disposed on the sound absorbing sheet. Place the antifouling sheet so that it overlaps to the vicinity of the end, and at the peripheral edge, make sure that the sound insulating sheet and the antifouling sheet overlap without interposing the sound absorbing sheet. A sheet, a sound absorbing sheet and an antifouling sheet are laminated, and an adhesive is applied to at least a region where a peripheral end formed by directly joining the sound insulating sheet and the antifouling sheet is formed, and the adhesive Is applied to the pressed portion to form a bonded portion where the sound insulating sheet and the antifouling sheet are bonded by an adhesive, and then cut along the outer periphery of the bonded portion, at least, A soundproof sheet, characterized in that a soundproof sheet is obtained by forming a joint portion where the soundproof sheet and the antifouling sheet are directly bonded to each other at the peripheral end, and integrating the sound insulating sheet, the sound absorbing sheet and the antifouling sheet. A manufacturing method is provided.

  According to the present invention, it is possible to provide a soundproof sheet that is excellent in workability and safety of attachment as well as ensuring high soundproofness. Moreover, according to this invention, the manufacturing method of the soundproof sheet which can obtain the soundproof sheet which has the above outstanding functionalities simply can be provided. Furthermore, by providing a soundproof sheet having excellent functionality as described above, it is possible to contribute to more efficient production of an outdoor unit or the like of an air conditioner that requires sound insulation means.

It is a schematic diagram of the soundproof sheet of an example of the present invention. It is a figure explaining the manufacturing method of the soundproof sheet illustrated in FIG. It is the schematic diagram of the soundproof sheet which provided the hole and notch for piping further in the soundproof sheet of FIG. It is a figure for demonstrating the structure and manufacturing method of a soundproof sheet of another example of this invention. It is a figure for demonstrating the structure and manufacturing method of a soundproof sheet of another example of this invention. It is a figure for demonstrating the conventional soundproof sheet. It is a figure for demonstrating the conventional soundproof sheet.

  Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. FIG. 1 shows a first embodiment of the present invention in which a joining portion is formed by welding at least on the peripheral edge of the sound absorbing sheet interposed between the sound insulating sheet and the antifouling sheet by thermal melting. It is a schematic diagram for demonstrating the soundproof sheet concerning a form (henceforth a 1st soundproof sheet). FIG. 2 shows a procedure for manufacturing the first soundproof sheet. Hereinafter, these will be described. The first soundproof sheet of the present invention is formed by forming a felt-like sound absorbing sheet 2 laminated on a sound insulating sheet 1 made of rubber or a thermoplastic elastomer with a thermoplastic resin or a thermoplastic elastomer. By thermally melting a part, the sound insulating sheet 1, the sound absorbing sheet 2, the sound absorbing sheet 2, and the antifouling sheet 3 are welded to each other at the heat melting portion. More specifically, the sound insulating sheet 1 and the antifouling sheet 3 are laminated through the sound absorbing sheet 2 up to the peripheral end portion 6 of the sound insulating sheet, and at least the joint portion 6 at the peripheral end portion is the sound absorbing sheet. The laminated body is integrated by the joint portion (see FIG. 1). Since it has such a structure, the soundproofing sheet of the present invention effectively prevents oil from penetrating into the sound absorbing sheet from its peripheral edge, and has high durability.

  For example, when applied to a compressor housed inside an outdoor unit of an air conditioner, the soundproof sheet 10 of the present invention is further provided with a hole 8 or a notch for piping in order to facilitate the mounting thereof. It is preferable to have a shape provided with (see FIG. 3). And around these holes or notches, a joining portion 6 is formed by welding a thermoplastic resin, which is a component of the sound absorbing sheet, and a sound insulating sheet and an antifouling sheet are laminated via the sound absorbing sheet. Is preferably provided. In this way, oil can be effectively prevented from penetrating into the sound absorbing sheet from the hole 8 or the cut portion, and attachment is facilitated, and at the same time, durability is not impaired.

  As the thermoplastic resin constituting the sound-absorbing sheet 2 in the above case, any resin can be used as long as it can be easily felt-like sheets, melted by heating, cured after cooling, and cured. It may be a material. Among these, in order to maintain the durability, those having moderate strength, moderate heat resistance, oil resistance, and moisture resistance and inexpensive are preferable. Specifically, polypropylene (PP), polyethylene terephthalate (PET), or the like can be used.

  The sound insulation sheet 1 constituting the soundproof sheet of the present invention is made of rubber or a thermoplastic elastomer. The heat melting of the sound insulation sheet is used independently or in addition to the heat melting of the thermoplastic resin constituting the sound absorbing sheet. And it can also be used for formation of a junction part. This point will be described later. As the material for forming the sound insulating sheet, any rubber or thermoplastic elastomer can be used. In order to make the soundproof sheet of the present invention more excellent in durability, the soundproof sheet is preferably made of a material excellent in heat resistance and oil resistance. Moreover, in order to make it adhere | attach with the molten thermoplastic resin which comprises a sound absorption sheet in a favorable state, it is preferable to form with the material which consists of a butyl rubber, a PVC type, or an olefin type thermoplastic elastomer, for example.

  The antifouling sheet 3 constituting the soundproof sheet of the present invention is made of an aluminum foil or a composite material having an aluminum foil. As the aluminum foil, any one used for conventional soundproofing sheets can be used. Examples of the composite material having an aluminum foil include what is called aluminum glass in which glass fibers having high strength and excellent heat resistance are bonded to the aluminum foil, and any of them can be used. Other materials can be used as long as the same purpose as these materials can be achieved.

  The first soundproof sheet 10 of the present invention can be manufactured very easily by the following method. An example thereof is shown in FIG. 2, which will be described with reference to this. First, the sound insulating sheet 1 made of the material as described above, the sound absorbing sheet 2 made of a thermoplastic resin, and the antifouling sheet 3 are laminated in this order. In this case, they are almost the same shape and are stacked. A laminate is used. Next, a welded portion that becomes at least a peripheral end portion is formed on the obtained laminate. Specifically, for example, a frame-shaped block 4 for forming a peripheral end portion as shown in FIG. 2A is prepared in a portion to be welded, and this is heated. It arrange | positions at the antifouling sheet 3 side, and presses it with fixed pressure. Then, heat is transmitted from the block, and the portion corresponding to the block 4 of the thermoplastic resin located in the middle of the laminate is heated and melted. When cooled after that, the melted portion is cured and a joined portion is formed. As a result, the sound absorbing sheet 2 is welded to each of the sound insulating sheet 1 and the antifouling sheet 3 at the heated and melted portion to form a joint portion 6 as shown in FIG. It becomes a laminated body. In this case, depending on the heating temperature of the block, not only the sound absorbing sheet 2 is melted, but also the sound insulating sheet 1 laminated with the sound absorbing sheet 2 is the forming material of rubber or thermoplastic. The elastomer may melt and contribute to the formation of the joint portion. According to such a configuration, the sheets can be integrated more firmly.

  In the illustrated example, the block has a frame shape, but the present invention is not limited to this, and a block molded into a shape to be welded may be used. For example, in addition to the frame shape shown in the figure, it is also a preferred embodiment to prepare a block having a shape in which a hole 8 for passing a pipe or the like and a portion where a notch is to be welded are used by heating. By doing so, the portion is welded and cured in a laminated state, so if a desired hole 8 or notch is provided in that portion, the surrounding sound absorbing material is removed to form the hole. Compared with, the soundproofing function around the hole is not impaired. Furthermore, it is possible to reliably prevent oil from entering from the periphery of the hole or the like by the welded joint portion formed around the hole or the like. In addition, according to the above method, the hole and the cut can be freely provided at a desired position of the soundproof sheet only by changing the shape of the heating block and the position where the block is heated and pressed. Extremely practical value.

  After forming the joint portion 6 by melting as described above, the outer periphery of the frame-shaped joint portion 6 can be easily processed by cutting the outer periphery of the frame-shaped joint portion 6 with a cutting machine 5 using a punching blade such as Swedish steel. The sheet 1, the sound absorbing sheet 2, and the antifouling sheet 3 are laminated in this order, and the soundproofing sheet 10A of the present invention having at least the joining portion 6 formed by welding on the outer peripheral portion thereof can be easily obtained. Since the felt or the like, which is the material of the sound-absorbing sheet 2, is not exposed from the peripheral end portion, the adhesive portion 6 does not leak into the felt and can reduce the risk of ignition. Furthermore, since the aluminum foil used in the above has higher hardness than normal household aluminum foil, there is a possibility that the operator may accidentally injure the cut if the edge of the aluminum foil is exposed. According to the method of the present invention, since the antifouling sheet 3 made of aluminum foil or the like is completely bonded to the sound insulating sheet 1 and the sound absorbing sheet 2, and the terminal is not sharp, the risk of injury due to the cross section can be reduced. , Can increase its safety.

  Next, a soundproof sheet 10B according to another aspect of the present invention using a material other than a thermoplastic resin as the material of the sound absorbing sheet 2 will be described. The soundproof sheet 10B is formed by laminating a soundproof sheet 1 made of rubber or a thermoplastic elastomer, a felt-like sound absorbing sheet 2, and an antifouling sheet 3 made of aluminum foil or the like in this order, and at least the soundproofing sheet 10B. The joining portion 6 is formed and integrated at the peripheral edge of the sheet, and the joining portion 6 is in a state where the sound insulating sheet 1 and the antifouling sheet 3 are directly laminated without the sound absorbing sheet 2 interposed therebetween. Configured. In this case, the joining portion 6 is either by heat melting of the sound insulating sheet 1 formed of rubber or thermoplastic elastomer, or by adhesion with an adhesive interposed between the sound insulating sheet 1 and the antifouling sheet 3. Can be formed. Examples of materials other than the thermoplastic resin that can be used at this time include thermosetting resins and glass wool that do not melt the resin. By adopting such a form, the material for forming the sound absorbing sheet 2 is not limited to the thermoplastic resin, and various materials can be used. As a result, the range of selection of materials is widened, and it is possible to manufacture a soundproof sheet that is more excellent in functionality and more inexpensive.

  As shown in FIG. 4, the soundproof sheet 10 </ b> B of the above-described form is the soundproof sheet 10 </ b> A of the form described above in the form of the sound absorbing sheet 2 to be used, and the sound absorbing sheet 2 is bonded to the joint portion where the sound absorbing sheet 2 is heat welded The sound insulation sheet 1 and the antifouling sheet 3 are directly laminated without using the sound absorbing sheet 2 in the vicinity of the outer periphery thereof. And the frame-shaped block 4 for forming the same peripheral edge part as used previously is prepared, this is heated, the heated block is arrange | positioned at the antifouling sheet | seat 3 side, and it presses with fixed pressure. . Then, heat is transmitted from the block, rubber or thermoplastic elastomer as a material for forming the sound insulation sheet 1 of the laminate is melted, and the sound insulation sheet 1 and the antifouling sheet 3 are welded to form the joint portion 6. As another method, as shown in FIG. 5, an adhesive is interposed in a portion where the sound insulating sheet 1 and the antifouling sheet 3 are directly laminated without using the sound absorbing sheet 2, and then necessary. Accordingly, by pressing a portion where an adhesive is interposed, the sound insulating sheet 1 and the antifouling sheet 3 are bonded with an adhesive to form the joint portion 6. In this case, it is only necessary to apply the adhesive 7 only to the portion where the sound insulating sheet 1 and the antifouling sheet 3 are directly bonded, so that the amount of the adhesive 7 used can be significantly reduced as compared with the conventional case. Any conventionally used adhesive can be used.

  Then, using the cutting machine 5, it cut | disconnects using the cutting machine 5 along the outer periphery of the junction part 6 by which the sound insulation sheet 1 and the antifouling sheet 3 which were formed as mentioned above weld or adhere | attach directly. Thus, the soundproof sheet 10B of the present invention can be easily obtained. In the example shown in FIG. 4 or 5, the soundproof sheet 10 </ b> B in which the sound insulating sheet 1, the sound absorbing sheet 2, and the antifouling sheet 3 are integrated is easily obtained in a state where the sound absorbing sheet is accommodated inside the joint portion 6. It is done. Since the sound insulating sheet 1 and the antifouling sheet 3 are firmly welded or bonded to each other at the end of the soundproofing sheet 10B, a part of the above sound absorbing sheet is welded to form a joint portion and integrated. Similar to the seat 10A, the safety is high.

  As an application example of the present invention, for example, there is a soundproof sheet useful as a soundproofing means for effectively preventing operation sound emitted from a compressor housed inside an outdoor unit of an air conditioner from leaking to the outside. It is done. The soundproof sheet has not only soundproofing performance but also excellent workability and can be easily formed in various shapes. Therefore, the soundproof sheet is not limited to the above, and can be applied to various uses for soundproofing. Therefore, its practical value is extremely high.

1: Sound insulation sheet 2: Sound absorption sheet 3: Antifouling sheet 4: Heating block 5: Cutting blade 6: Joining portion 7: Adhesive 8: Hole 9: Tag pin 10: Soundproof sheet 20: Compressor

Claims (6)

A sound insulating sheet made of rubber or a thermoplastic elastomer, a felt-like sound absorbing sheet, and the antifouling sheet glass fiber consists glued aluminum glass aluminum foil is a composite material having a A Rumi foil, are laminated in this order And
The peripheral edge portion includes a sound insulation sheet, and antifouling sheet made of an aluminum glass are directly the product layer without passing through the sound absorbing sheet, the circumferential end portion of the sound barrier made of rubber or a thermoplastic elastomer sheet A joining portion between a sound insulating sheet formed by heat melting and an antifouling sheet made of aluminum glass is disposed, and the sound insulating sheet, the sound absorbing sheet, and the antifouling sheet are integrated by the joining portion. Soundproof sheet. The soundproof sheet according to claim 1, wherein a constituent material of the soundproof sheet is butyl rubber, PVC-based or olefin-based thermoplastic elastomer . Further provided holes or notches for piping, heat formed by welding of the thermoplastic resin, or a sound insulating sheet and the antifouling sheet sound absorption is these holes or cut construction materials of the sound absorbing sheet around the The soundproof sheet according to claim 1 or 2, wherein a joining portion in a state of being laminated via the sheet is provided. Soundproofing sheet according to any one of soundproofing sheet Der Ru claim 1-3 for use in a compressor contained therein outdoor unit of the air conditioner. A sound insulating sheet made of rubber or a thermoplastic elastomer, a felt-like sound absorbing sheet, antifouling sheet glass fiber consists glued aluminum glass aluminum foil is a composite material having a A Lumi foil, are laminated in this order And a manufacturing method for manufacturing a soundproof sheet in which the soundproof sheet, the sound absorbing sheet, and the antifouling sheet are integrated by a joint portion formed at the peripheral end portion thereof,
On the sound insulation sheet made of rubber or a thermoplastic elastomer, until the peripheral edge portion of the shielding sound sheet arranged sound absorbing sheet that have a beyond shape, further, on the said sound absorbing sheet, circumference of the sound insulating sheet An antifouling sheet made of aluminum glass is arranged so as to overlap to the vicinity of the end, and at the peripheral end, the sound insulating sheet and the antifouling sheet are overlapped without interposing the sound absorbing sheet, and the sound insulating sheet and the sound absorbing sheet And an antifouling sheet are laminated,
On the antifouling sheet in this state, at least a block having a shape capable of forming a peripheral end formed by directly joining the sound insulating sheet and the antifouling sheet is pressed in a heated state, and the block is pressed. Heat melting rubber or thermoplastic elastomer constituting the sound insulation sheet in the formed part, and welding the sound insulation sheet and an antifouling sheet made of aluminum glass to form a joint part;
Then cut along the outer periphery of this joint,
At least the sound insulation sheet and the antifouling sheet are formed at the peripheral end portion by directly joining them with rubber or thermoplastic elastomer, and the sound insulation sheet, the sound absorbing sheet and the antifouling sheet are integrated with each other. A method for producing a soundproof sheet. The method for producing a soundproof sheet according to claim 5, wherein the soundproof sheet is made of a PVC-based or olefin-based thermoplastic elastomer .

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