JP2007036990A - Manufacturing method of diaphragm for speaker apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a diaphragm for a speaker apparatus capable of reducing the number of processes in a manufacturing process and capable of manufacturing a uniform quality diaphragm. <P>SOLUTION: The diaphragm for the speaker apparatus is obtained by providing a skin material as a skin layer on the surface of a diaphragm base member constituting a core layer. In the manufacturing method of the diaphragm, a skin material molded into a diaphragm shape such as a cone shape in advance is mounted on a forming die. Further, a diaphragm base member is softened beforehand by preliminary heating by a heater for example and is mounted on the forming die on which the skin member has been mounted. The diaphragm base member is molded into a predetermined shape by the forming die to prepare a diaphragm molded product and simultaneously the diaphragm base member and the skin material are stuck on each other. Hereby, in the prepared diaphragm positional displacement is prevented from happening between the diaphragm base member and the skin material, and a uniform diaphragm can be manufactured accurately. A manufacturing process can be more reduced, compared with a method where a diaphragm base member is independently molded and is then stuck on the skin material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a diaphragm for a speaker device.

  DESCRIPTION OF RELATED ART Conventionally, the diaphragm for speaker apparatuses which provides a skin material, a surface material, etc. on the surface of various foam materials is known (for example, refer patent documents 1 and 2).

A diaphragm for a speaker device made of a resin foam sheet described in Patent Document 1 includes a cell layer having a cell diameter of 100 μm or less and a cell density of 10 ⁹ cells / cm ³ or more, and a skin layer provided on the surface of the cell layer. It is configured. As a result, this diaphragm for a speaker device is said to have effects such as the reproduction frequency extending to the high sound range.

  In addition, the thin flat speaker diaphragm described in Patent Document 2 includes a core material made of a urethane foam layer, a surface material made of a polyester nonwoven fabric and the like laminated on the surface of the core material, a glass fiber and the like laminated on the surface. And a reinforcing material made of Thereby, this thin flat speaker diaphragm has an advantage that it can withstand severe conditions.

Japanese Patent Laid-Open No. 11-69483 JP 2001-313993 A

  As described above, as a method of manufacturing a diaphragm provided with a skin material (skin material), a surface material, etc. (hereinafter referred to as “skin material”) on the surface of the foam material, the foam material and the skin material are separately provided. Further, there is known a method of forming a molded product of a foam material and a molded product of a skin material by molding into a diaphragm shape and bonding them together using an adhesive or the like.

  However, this manufacturing method has a problem that the number of steps in the manufacturing process is large because the foam material and the skin material are separately formed. There is also a problem that it is difficult to manufacture a diaphragm having a uniform shape because a gap may occur when the molded product of the foam material and the molded product of the skin material are bonded together.

  Examples of the problems to be solved by the present invention include those described above. It is an object of the present invention to provide a method of manufacturing a diaphragm for a speaker device that can reduce the number of steps in the manufacturing process and can manufacture a diaphragm having a uniform quality.

  The invention according to claim 1 is a method for manufacturing a diaphragm, wherein a step of attaching a pre-formed skin material to a molding die, and a softened diaphragm base material are attached to the skin material. A step of attaching to a molding die, and a molding step of forming a diaphragm base by forming the diaphragm base material into a predetermined shape using the molding die. A plate base material and a skin material are bonded together.

  The invention according to claim 2 is a method of manufacturing a diaphragm, wherein the diaphragm base material and the skin material are predetermined by the step of attaching the diaphragm base material and the skin material to the molding die and the molding die. And forming a diaphragm molded product by forming the diaphragm base material, wherein the molding step is characterized by bonding the diaphragm base material and the skin material simultaneously with the molding.

  In one aspect of the present invention, a method of manufacturing a diaphragm includes a step of attaching a pre-formed skin material to a molding die, and a softening diaphragm base material, the molding die having the skin material attached thereto. And a molding step of forming a diaphragm base material into a predetermined shape by the molding die to form a diaphragm molding, the molding step and the diaphragm base material simultaneously with molding It is characterized by pasting together with a skin material.

  The above diaphragm manufacturing method is preferably used for manufacturing a diaphragm for a speaker device. The diaphragm is formed by providing a skin material as a skin layer on the surface of the diaphragm base material constituting the core layer. In a preferred example, the diaphragm base is made of foamed acrylic or other foamed material.

  First, a skin material previously molded into a diaphragm shape such as a cone shape is mounted on a molding die. Further, the diaphragm base material is softened by, for example, preheating with a heater in advance, and this is mounted on a molding die on which a skin material is mounted. Then, the diaphragm base material and the skin material are bonded together at the same time as the diaphragm base material is formed into a predetermined shape by a molding die to create a vibration plate molding. As described above, since the forming of the diaphragm base material and the bonding of the diaphragm base material and the skin material are simultaneously performed in the same process, there is a positional shift between the diaphragm base material and the skin material in the prepared diaphragm. It does not occur, and a diaphragm having a uniform shape can be manufactured with high accuracy. Further, the manufacturing process can be reduced as compared with a method in which the diaphragm base material is separately molded and then bonded to the skin material.

  In another aspect of the present invention, a method of manufacturing a diaphragm includes a step of attaching a diaphragm base material and a skin material to a molding die, and the diaphragm base material and the skin material into a predetermined shape by the molding die. Forming a diaphragm molded article by molding, and the molding step bonds the diaphragm base material and the skin material simultaneously with the molding.

  The above diaphragm manufacturing method is preferably used for manufacturing a diaphragm for a speaker device. The diaphragm is formed by providing a skin material as a skin layer on the surface of the diaphragm base material constituting the core layer. In a preferred example, the diaphragm base is made of foamed acrylic or other foamed material.

  First, the diaphragm base material and the skin material are mounted on a molding die. Then, the diaphragm base material and the skin material are formed into a predetermined shape by a molding die to create a diaphragm molded product, and at the same time, the diaphragm base material and the skin material are bonded together. In this way, since the forming of the diaphragm base material and the skin material and the bonding of the diaphragm base material and the skin material are simultaneously performed in the same process, the diaphragm base material and the skin material in the created diaphragm are used. There is no displacement, and a diaphragm having a uniform shape can be manufactured with high accuracy. Further, the manufacturing process can be reduced as compared with a method in which the diaphragm base material is separately molded and then bonded to the skin material.

  In one aspect of the above method for manufacturing a diaphragm, the diaphragm base material includes a plurality of base materials having different properties, and the forming step forms the plurality of base materials by integrating them. In this aspect, since the diaphragm base material is constituted by a plurality of base materials having different properties, a diaphragm having a desired weight, rigidity, and the like can be manufactured by selecting the base materials. In a preferred example, the plurality of base materials can be foam materials having different expansion ratios.

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

[First embodiment]
With reference to FIG. 1, the structure of a diaphragm for a speaker device (hereinafter also simply referred to as “diaphragm”) according to a first embodiment of the present invention will be described. In the present invention, the shape and size of the diaphragm are not limited to the forms described below.

  FIG. 1A is a perspective view of a diaphragm 10 according to an embodiment of the present invention that can be applied to various speaker devices. FIG. 1B is a plan view of the diaphragm 10. FIG. 1C is a partial cross-sectional view showing a cross-sectional state of the diaphragm 10 shown in FIGS. 1A and 1B.

  The diaphragm 10 is formed in a cone shape. The inner peripheral edge portion 10a of the diaphragm 10 is attached to a voice coil bobbin that is an element of a speaker device (not shown). On the other hand, an edge, which is an element of a speaker device (not shown), is attached to the outer peripheral edge portion 10 b of the diaphragm 10.

  The diaphragm 10 is made of a foam material such as foamed acrylic. Specifically, the diaphragm 10 includes a foam material 11 as a diaphragm base material, and a skin material 12 provided on both surfaces thereof. The foam material 11 has a role of a core layer (core material) of the diaphragm 10, and the skin material 12 has a role of a skin layer. As described above, the diaphragm 10 is provided with the skin material 12 having a predetermined thickness on the surface thereof, so that the diaphragm 10 has a high rigidity (Young's modulus) and excellent environmental resistance such as heat resistance.

  Next, with reference to FIG. 3, the manufacturing method of the diaphragm by 1st Example is demonstrated.

  FIG. 2 schematically shows a process chart of the method of manufacturing the diaphragm according to the first embodiment. In the method for manufacturing the diaphragm according to the first embodiment, the pair of skin materials 12 are previously formed into a diaphragm shape.

  First, a foam material sheet 11x such as foamed acrylic formed in a sheet shape is prepared, and the foam material sheet 11x is placed between a pair of heaters 50 and preheated until softened to some extent (preheating process: S1). Next, the preheated foam sheet 11x is taken out from the heater 50 (takeout step: S2).

  Next, a pair of preformed skin materials 12 are mounted on the mold 51. In the present embodiment, the diaphragm 10 has a cone shape, and the mold 51 includes a male mold 51a and a female mold 51b as shown in the figure. Therefore, one skin material 12 molded in a cone shape in advance is mounted on the convex portion formed on the lower surface side of the male mold 51a, and another skin material 12 also molded in a cone shape is mounted on the female mold 51b. It attaches to the recessed part currently formed in the upper surface side. Then, the foam sheet 11x is mounted on the mold 51 so as to sandwich the preheated foam sheet 11x by the male mold 51a and the female mold 51b (mounting process: S3). Note that an adhesive or the like is applied between the foam material sheet 11x and the skin material 12 as necessary.

  Next, the foam sheet 11x mounted on the mold 51 is pressed (clamped) by the male mold 51a and the female mold 51b (molding step: S4). At this time, the temperature of the mold 51 is such that the shape of the diaphragm as a molded product can be maintained, specifically, a temperature higher than room temperature and a temperature of about 130 ° C. or less, preferably about 130 ° C. The temperature is set. The pressing (clamping) is performed through a pressing device (not shown).

  Next, the clamp of the foam material sheet 11x by the male mold 51a and the female mold 51b is released, and the molded product made of the foam material sheet 11x and the skin material 12 formed into a diaphragm shape is taken out, and the foam material sheet 11x is unnecessary. The portion is trimmed and removed (trimming step: S5). In this way, the diaphragm 10 having the shape shown in FIG. 1 is manufactured.

  As described above, in the method of manufacturing the diaphragm according to the first embodiment, the foam material is formed by setting the pre-formed skin material in the mold and sandwiching the foam material softened by the preheating with the mold. And bonding the skin material to the foam material simultaneously. Thereby, the number of processes in the manufacturing process can be reduced. In addition, since the foam material is molded by a mold equipped with a skin material, there is no deviation between the molded foam material and the skin material, and it is possible to accurately manufacture a diaphragm having a uniform shape. It becomes.

[Second Embodiment]
A second embodiment will be described. The configuration of the diaphragm according to the second embodiment is basically the same as that of the diaphragm according to the first embodiment shown in FIG. Therefore, the description regarding the structure of a diaphragm is abbreviate | omitted.

  With reference to FIG. 3, the manufacturing method of the diaphragm by 2nd Example is demonstrated.

  FIG. 3 schematically shows a process diagram of a method for manufacturing a diaphragm according to the second embodiment. In the method for manufacturing a diaphragm according to the first embodiment, the pair of skin materials 12 are previously formed into a diaphragm shape. However, in the method for manufacturing a diaphragm according to the second embodiment, a pair of sheet shapes (that is, , Unformed state) skin material sheet is used.

  First, a foam material sheet 11x such as foamed acrylic formed in a sheet shape is prepared, and the foam material sheet 11x is placed between a pair of heaters 50 and preheated until softened to some extent (preheating process: S11). Next, the preheated foam sheet 11x is taken out from the heater 50 (takeout step: S12).

  Next, the preheated foam sheet 11x is sandwiched between the pair of skin material sheets 12x and mounted on the mold 51 (mounting step: S13). As shown, the mold 51 includes a male mold 51a and a female mold 51b. Therefore, the skin material sheet 12x is disposed above and below the foam material sheet 11x, and is mounted between the male mold 51a and the female mold 51b.

  Next, the foam sheet 11x and the pair of skin material sheets 12x mounted on the mold 51 are pressed (clamped) by the male mold 51a and the female mold 51b (molding step: S14). At this time, the temperature of the mold 51 is such that the shape of the diaphragm as a molded product can be maintained, specifically, a temperature higher than room temperature and a temperature of about 130 ° C. or less, preferably about 130 ° C. The temperature is set. The pressing (clamping) is performed through a pressing device (not shown).

  Next, the clamp of the foam material sheet 11x and the skin material sheet 12x by the male mold 51a and the female mold 51b is released, and a molded product composed of the base material 11x and the skin material 12 molded into a diaphragm shape is taken out, and the foam material Unnecessary portions of the sheet 11x and the skin material sheet 12x are removed by trimming (trimming step: S15). In this way, the diaphragm 10 having the shape shown in FIG. 1 is manufactured.

  In the second embodiment, the skin material sheet 12x is also formed by pressing simultaneously with the foam material sheet 11x in the forming step S14. Therefore, it is necessary to form the skin material sheet 12x with a thermoplastic resin that can be molded at a temperature close to the molding temperature of the foam material sheet 11x, or to attach the thermoplastic resin to the skin material sheet 12x by coating or the like. There is.

Thus, in the method of manufacturing the diaphragm according to the second embodiment, the foam material softened by the preheating is sandwiched between the skin materials in the state of being sandwiched by the mold, thereby forming the foam material, and forming the skin material. The skin material is bonded to the foam material at the same time. Thereby, like the first embodiment, the number of steps in the manufacturing process can be reduced. In addition, since the foam material and the skin material are molded simultaneously in the same mold, there is no deviation between the molded foam material and the skin material, and it is possible to accurately manufacture a diaphragm having a uniform shape. It becomes. Further, depending on the type of the skin material, an adhesive for bonding the foam material and the skin material becomes unnecessary, and the weight of the diaphragm can be reduced. By reducing the weight of the diaphragm, the magnetic circuit of the speaker device can also be reduced. Further, in the second embodiment, the skin material is molded simultaneously with the molding of the foam material and the bonding of the skin material to the foam material. Compared with the first embodiment in which the molding of the skin material is performed in a separate process in advance. Further, the number of steps can be reduced.
[Third embodiment]
Next, a third embodiment will be described. FIG. 4A is a perspective view of the diaphragm 20 according to the third embodiment, which can be applied to various speaker devices. FIG. 4B shows a plan view of the diaphragm 20. FIG. 4C is a partial cross-sectional view showing a cross-sectional state of the diaphragm 20 shown in FIGS. 4A and 4B.

  The diaphragm 20 is formed in a cone shape. The inner peripheral edge 20a of the diaphragm 20 is attached to a voice coil bobbin that is an element of a speaker device (not shown). On the other hand, an edge which is an element of a speaker device (not shown) is attached to the outer peripheral edge 20b of the diaphragm 20.

  The diaphragm 20 is made of a foam material such as foamed acrylic. Specifically, as shown in FIG. 4C, the diaphragm 20 includes foam materials 21a and 21b as the diaphragm base material, and a skin material 22 provided on both surfaces thereof. The foam materials 21a and 21b have a role of a core layer (core material) of the diaphragm 20, and the skin material 22 has a role of a skin layer. As described above, the diaphragm 20 is provided with the skin material 22 having a predetermined thickness on the surface thereof, so that the diaphragm 20 has high rigidity (Young's modulus) and excellent environmental resistance such as heat resistance.

  In this embodiment, the core layer of the diaphragm is composed of two foam materials 21a and 21b. As the foam materials 21a and 21b, the same type of foam materials with different expansion ratios (for example, foamed acrylics with different expansion ratios) or a combination of different types of foam materials (for example, urethane, polyethylene, polypropylene, polystyrene, etc.) are used. . Thus, by forming the core layer by combining foam materials having different foaming ratios or materials, the weight and rigidity of the diaphragm 20 can be set to desired values, and the sound quality of the speaker device using the diaphragm 20 is improved. And improvement of the characteristics.

  Next, with reference to FIG. 5, the manufacturing method of the diaphragm by 3rd Example is demonstrated.

  FIG. 5 schematically shows a process diagram of a method of manufacturing a diaphragm according to the third embodiment. In the method of manufacturing the diaphragm according to the third embodiment, the pair of skin materials 22 are previously formed into a diaphragm shape.

  First, a base material 21ax (hereinafter referred to as “foam material sheet 21ax”) of the foam material 21a formed in a sheet shape is prepared, and the foam material sheet 21ax is disposed between a pair of heaters 50a to some extent. Preheat until softened. Separately, a base material 21bx (hereinafter referred to as “foam material sheet 21bx”) of the foam material 21b formed in a sheet shape is prepared, and the foam material sheet 21bx is provided between the pair of heaters 50b. And preheating until softening to some extent (preheating step: S21). Next, the preheated foam sheets 21ax and 21bx are taken out from the heaters 50a and 50b, respectively (takeout step: S22).

  Next, a pair of skin material 22 formed in advance is mounted on the mold 51. In this embodiment, the diaphragm 20 has a cone shape, and the mold 51 includes a male mold 51a and a female mold 51b as shown in the figure. Therefore, one skin material 22 previously molded in a cone shape is attached to the convex portion formed on the lower surface side of the male mold 51a, and another skin material 22 also molded in a cone shape is mounted on the female mold 51b. It attaches to the recessed part currently formed in the upper surface side. Then, the preheated foam material sheets 21ax and 21bx are sandwiched between the male mold 51a and the female mold 51b and are mounted on the mold 51 (mounting step: S23). Note that the foam sheets 21ax and 21bx, and the skin An adhesive or the like is applied between the material 22 as necessary.

  Next, the foam material sheets 21ax and 21bx mounted on the mold 51 are pressed (clamped) by the male mold 51a and the female mold 51b (molding step: S24). At this time, the temperature of the mold 51 is such that the shape of the diaphragm as a molded product can be maintained, specifically, a temperature higher than room temperature and a temperature of about 130 ° C. or less, preferably about 130 ° C. The temperature is set. The pressing (clamping) is performed through a pressing device (not shown).

  Next, the clamp of the foam material sheets 21ax and 21bx by the male mold 51a and the female mold 51b is released, and the foamed material sheets 21ax and 21bx and the skin material 12 which are molded into a diaphragm shape are taken out, and the foam material is taken out. Unnecessary portions of the sheets 21ax and 21bx are trimmed and removed (trimming step: S25). In this way, the diaphragm 20 having the shape and layer configuration shown in FIG. 4 is manufactured.

  As described above, in the method for manufacturing the diaphragm according to the third embodiment, the foam material is molded by setting the skin material formed in advance in the mold and sandwiching the foam material softened by the preheating with the mold. And bonding the skin material to the foam material simultaneously. Thereby, the number of processes in the manufacturing process can be reduced. In addition, since the foam material is molded by a mold equipped with a skin material, there is no deviation between the molded foam material and the skin material, and it is possible to accurately manufacture a diaphragm having a uniform shape. It becomes. Furthermore, since the core layer of the diaphragm is made of foam materials with different characteristics, the weight and rigidity of the diaphragm can be set to desired values, and the sound quality and characteristics of the speaker device using the diaphragm can be improved. Become. In this embodiment, the core layer is formed of two foam materials, but the core layer may be formed of three or more types of foam materials.

  In the above description, the diaphragm 20 according to the third embodiment is manufactured by the same method as that of the first embodiment, that is, the method in which the skin material 22 is formed in advance. It can also be produced by the same method as in the examples. That is, a pair of skin material sheets are prepared and attached to the mold 51 with the foam material sheets 21ax and 21bx sandwiched therebetween. In this case, as in the second embodiment, the skin material sheet may be made of a thermoplastic resin that can be molded simultaneously with the foam material or may be coated with such a resin. In addition, depending on the type of skin material, the adhesive can be omitted, and the weight of the diaphragm can be reduced.

[Example of application to speaker devices]
Next, an example in which the diaphragm 10 or 20 according to the present embodiment is applied to an external magnet type speaker device will be described with reference to FIG. FIG. 6 is a half sectional view showing the configuration of the speaker device 100 to which the diaphragm 10 or 20 according to the present embodiment is applied.

  The speaker device 100 mainly includes a magnetic circuit 40 having a yoke 1, a magnet 2 and a plate 3, a frame 4, a voice coil bobbin 5, a voice coil 6, a damper 7, the diaphragm 10 or 20 according to the above embodiment, an edge 8, and And a vibration system 41 having a cap 9. Note that the diaphragm 10 or 20 of the present invention is not only applied to the speaker device 100 having the following configuration, but can be applied to speaker devices having various configurations and driving methods. .

  First, the configuration of the magnetic circuit 40 will be described. The magnetic circuit 40 is configured as an external magnet type magnetic circuit. The yoke 1 has a pole portion 1a having a substantially columnar shape, and a flange portion 1b extending outward from the lower end of the outer peripheral wall of the pole portion 1a. A magnet 2 having a substantially annular shape is attached on the flange portion 1 b, and a plate 3 having a substantially annular shape is attached on the magnet 2. The outer peripheral wall of the pole part 1a faces the inner peripheral wall of the magnet 2 and the plate 3, and a magnetic gap 60 is formed between the inner peripheral wall of the plate 3 and the outer peripheral wall of the pole part 1a.

  Next, the configuration of the vibration system 41 will be described.

  The frame 4 has a function of supporting various components constituting the speaker device 100. The frame 4 has a substantially cup-like shape, and includes a first flange portion 4a formed in the vicinity of the center portion thereof, and a second flange portion 4b formed at the upper end portion thereof. The lower end of the frame 4 is attached on the plate 3.

  The voice coil bobbin 5 has a function of vibrating with the voice coil 6 in accordance with an input signal and transmitting the vibration to the diaphragm 10 or 20. The voice coil bobbin 5 has a substantially cylindrical shape, and is disposed at a position covering the vicinity of the upper end portion of the pole portion 1 a that is an element of the yoke 1.

  The voice coil 6 has positive and negative lead wires and is wound around the lower end portion of the outer peripheral wall of the voice coil bobbin 5.

  The damper 7 has a substantially annular shape, has an elastic portion in which a plurality of concentric corrugations (corrugation) is formed, and elastically supports the voice coil bobbin 5. The inner peripheral edge of the damper 7 is attached in the vicinity of the upper end of the outer peripheral wall of the voice coil bobbin 5, while the outer peripheral edge of the damper 7 is attached on the first flange 4 a that is an element of the frame 4.

  In particular, the diaphragm 10 or 20 according to the present embodiment is manufactured by the above-described diaphragm manufacturing method according to the first to third embodiments. The diaphragm 10 or 20 has a function of emitting a sound wave according to an input signal. The inner peripheral edge of the diaphragm 10 or 20 is attached near the upper end of the outer peripheral wall of the voice coil bobbin 5 and on the upper side of the damper 7.

  The edge 8 has an Ω-shaped cross-sectional shape and an annular planar shape, and has a function of absorbing unnecessary vibration generated in the speaker device 100. The inner peripheral edge portion of the edge 8 is attached to the outer peripheral edge portion of the diaphragm 10 or 20, while the outer peripheral edge portion of the edge 8 is attached to the second flange portion 4 b that is an element of the frame 4.

  The cap 9 has a dome shape and has a function of preventing dust and the like from entering the speaker device 100. The cap 9 is disposed at a position covering the upper surface side of the voice coil bobbin 5 and is attached in the vicinity of the inner peripheral edge of the diaphragm 10 or 20.

  In the speaker device 100 having the above configuration, when a signal or electric power is input from the amplifier side to the voice coil 6, a driving force is generated in the voice coil 6 within the magnetic gap 60, and the diaphragm 10 or 20 is connected to the speaker device. 100 is vibrated in the direction of the central axis L1. Thus, the speaker device 100 radiates sound waves toward the front surface of the diaphragm 10 or 20, that is, in the direction of the arrow Y1.

The perspective view of the diaphragm by 1st Example, a top view, and a fragmentary sectional view are shown. It is a flowchart which shows the manufacturing method of the diaphragm by 1st Example. It is a flowchart which shows the manufacturing method of the diaphragm by 2nd Example. The perspective view of the diaphragm by 3rd Example, a top view, and a fragmentary sectional view are shown. It is a flowchart which shows the manufacturing method of the diaphragm by 3rd Example. The structural example of the speaker apparatus which applied the diaphragm of the Example is shown.

Explanation of symbols

10, 20 Speaker device diaphragm 11, 21a, 21b Foam (core layer)
11x, 21ax, 21bx Foam sheet 12, 22 Skin material (skin layer)
12x, 22x skin material sheet 50 heater 51 mold 51a male 51b female 100 speaker device

Claims (4)

Attaching a pre-molded skin material to a molding die;
Attaching the softened diaphragm base material to the molding die on which the skin material is attached;
Forming a diaphragm base material by molding the diaphragm base material into a predetermined shape by the molding die, and
In the forming step, the diaphragm base material and the skin material are bonded together simultaneously with the molding. Attaching the diaphragm base material and the skin material to the molding die; and
A molding step of forming a diaphragm base material and a skin material into a predetermined shape by the molding die to create a diaphragm molding, and
In the forming step, the diaphragm base material and the skin material are bonded together simultaneously with the molding. The diaphragm base material includes a plurality of base materials having different properties,
The method for manufacturing a diaphragm according to claim 1, wherein the forming step is performed by integrating the plurality of base materials. The method for manufacturing a diaphragm according to claim 3, wherein the plurality of base materials are foam materials having different foaming ratios.

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