CN109040915B - Vibrating diaphragm forming die and vibrating diaphragm forming method - Google Patents
Vibrating diaphragm forming die and vibrating diaphragm forming method Download PDFInfo
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- CN109040915B CN109040915B CN201810724724.9A CN201810724724A CN109040915B CN 109040915 B CN109040915 B CN 109040915B CN 201810724724 A CN201810724724 A CN 201810724724A CN 109040915 B CN109040915 B CN 109040915B
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- 238000003825 pressing Methods 0.000 claims abstract description 133
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- 238000005253 cladding Methods 0.000 claims description 22
- 238000000465 moulding Methods 0.000 claims description 14
- 239000007769 metal material Substances 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000004696 Poly ether ether ketone Substances 0.000 description 9
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2207/00—Details of diaphragms or cones for electromechanical transducers or their suspension covered by H04R7/00 but not provided for in H04R7/00 or in H04R2307/00
- H04R2207/021—Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
- H04R2231/001—Moulding aspects of diaphragm or surround
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Manufacturing & Machinery (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention discloses a vibrating diaphragm forming die and a vibrating diaphragm forming method, which comprise a pressing unit and a base matched with the pressing unit, wherein the base is configured to be used for attaching a material belt and preheating the material belt; the pressing unit comprises a first pressing part and a second pressing part arranged around the first pressing part, and an annular airflow cavity with an open end is formed between the first pressing part and the second pressing part; the first pressing part is configured to be matched with the base to press the material belt parts corresponding to the first pressing part into the diaphragm ball top, and the second pressing part is configured to be matched with the base to press the material belt parts corresponding to the second pressing part into the diaphragm fixing part; one surface of the base is provided with an annular bulge, the annular bulge corresponds to the annular airflow cavity, and the annular bulge is configured to enable the material belt to be tightly attached to the surface of the annular bulge under the action of air pressure to form a vibrating diaphragm bending part. The vibrating diaphragm forming die and the vibrating diaphragm forming method can form the vibrating diaphragm with good flatness.
Description
Technical Field
The invention relates to the technical field of electroacoustic products, in particular to a diaphragm forming die and a diaphragm forming method.
Background
The conventional speaker generally includes a vibration system and a magnetic circuit system, wherein the vibration system includes a diaphragm and a voice coil combined together, and the diaphragm includes a ball top portion, a corrugated portion and a peripheral fixing portion combined in sequence from inside to outside. The diaphragm is one of the key parts for the sound production of the loudspeaker, and the sound production performance of the loudspeaker is directly influenced by the quality of the performance of the diaphragm.
In the prior art, when the diaphragm is prepared, the surface of the ball top and the peripheral fixing part of the diaphragm is easy to form wave-shaped folds, so that the thickness of the diaphragm is uneven, and the acoustic performance of the loudspeaker is affected. Especially, when the diaphragm is formed by PEEK (polyetheretherketone) material, the above problem is more likely to be caused. And, there is the fold in DOME surface and the periphery fixed part surface of vibrating diaphragm, still can cause the DOME to bond DOME to and there is the gap in periphery fixed part and the bonding process of speaker second briquetting, lead to the waterproof nature of speaker and gas tightness not good. Therefore, it is necessary to develop a new diaphragm molding technique to provide the dome and peripheral fixing portion surfaces of the diaphragm with good flatness.
Disclosure of Invention
The invention aims to provide a new technical scheme for forming a vibrating diaphragm.
According to a first aspect of the present invention, there is provided a diaphragm forming mold, including: the base is configured to be used for attaching the material belt and carrying out preheating treatment on the material belt; the press-fit unit includes: the air flow device comprises a first pressing part and a second pressing part arranged around the first pressing part, wherein an annular air flow cavity with an open end is formed between the first pressing part and the second pressing part; the first pressing part is configured to be matched with the base to press the material belt part corresponding to the first pressing part into the diaphragm ball top, and the second pressing part is configured to be matched with the base to press the material belt part corresponding to the second pressing part into the diaphragm fixing part; an annular bulge is arranged on one surface of the base and corresponds to the annular airflow cavity, and the annular bulge is configured to enable the material belt to be tightly attached to the surface of the annular bulge under the action of air pressure in the annular airflow cavity so as to form a diaphragm bending part.
Optionally, the first nip comprises: the vibration isolator comprises a first pressing block and a first cladding part combined with the bottom of the first pressing block, wherein the bottom of the first cladding part is configured to form a diaphragm ball top with a preset shape. Optionally, the first pressing block and the first mold covering part are integrally formed; or the first pressing block is fixedly connected with the first cladding part.
Optionally, the first overmold portion is made of a metal material, a plastic material, or a rubber material.
Optionally, the second nip comprises: and the second pressing block is arranged around the first pressing part, a circle of second cladding part is arranged on the inner wall of the second pressing block, and the bottom of the second cladding part is configured to form a diaphragm fixing part in a preset shape.
Optionally, the second pressing block and the second mold covering part are integrally formed; or the second pressing block is fixedly connected with the second cladding part.
Optionally, the second overmold portion is made of a metal material, a plastic material, or a rubber material.
According to a second aspect of the present invention, there is provided a diaphragm molding method, including:
attaching a material belt to the base, and carrying out preheating treatment on the material belt by the base;
the pressing unit moves towards the direction of the base, so that the first pressing part and the second pressing part are in contact with the material belt attached to the base and heat the material belt; simultaneously, introducing airflow into the annular airflow cavity;
the pressing unit continues to move towards the direction of the base, the first pressing part presses the corresponding material belt part to form a vibrating diaphragm ball top in a preset shape, the second pressing part presses the corresponding material belt part to form a vibrating diaphragm fixing part in a preset shape, and the air flow in the annular air flow cavity presses the corresponding material belt part to be tightly attached to the surface of the annular bulge to form a vibrating diaphragm bending ring part.
Optionally, the first nip comprises: the vibration isolator comprises a first pressing block and a first cladding part combined with the bottom of the first pressing block, wherein the bottom of the first cladding part is configured to form a diaphragm ball top with a preset shape.
Optionally, the second nip comprises: and the second pressing block is arranged around the first pressing part, a circle of second cladding part is arranged on the inner wall of the second pressing block, and the bottom of the second cladding part is configured to form a diaphragm fixing part in a preset shape.
The vibrating diaphragm forming die provided by the embodiment of the invention has a simple structure, and when the vibrating diaphragm is formed by using the die, the surfaces of the top of the vibrating diaphragm ball and the fixed part of the vibrating diaphragm can have good flatness, so that the thickness of the vibrating diaphragm is uniform.
The vibrating diaphragm forming method provided by the embodiment of the invention is simple to operate, and the vibrating diaphragm with excellent flatness can be formed by matching the pressing unit with the base.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.
Fig. 1 shows a schematic structural diagram of a diaphragm forming mold according to an embodiment of the present invention.
Fig. 2 shows a schematic structural diagram of another diaphragm forming mold according to an embodiment of the present invention.
Fig. 3 shows a flowchart of a diaphragm forming method according to an embodiment of the present invention.
And parts are indicated by reference numerals.
1. The pressing unit comprises 11 a first pressing block, 12 a first cladding part, 13 a second pressing block, 14 a second cladding part, 2 a base, 21 an annular bulge and 3 an annular airflow cavity.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 and 2, a diaphragm forming mold according to an embodiment of the present invention includes: the laminating unit 1 and with the base 2 of laminating unit 1 looks adaptation, base 2 is configured to be used for attaching the material area and carry out preheating treatment to the material area. The material belt is a raw material for preparing the vibrating diaphragm, can be of a single-layer structure or a multi-layer composite structure, but at least one layer of the material belt is made of PEEK materials.
The above-mentioned pressing unit 1 includes: the air flow device comprises a first pressing part and a second pressing part arranged around the first pressing part, wherein an annular airflow cavity 3 with an open end is formed between the first pressing part and the second pressing part; the first pressing part is configured to cooperate with the base 2 to press the material belt portion on the base 2 corresponding to the first pressing part into the top of the diaphragm ball, and the second pressing part is configured to cooperate with the base 2 to press the material belt portion on the base 2 corresponding to the second pressing part into the diaphragm fixing portion. An annular protrusion 21 is disposed on one surface of the base 2, and the position of the annular protrusion 21 corresponds to the position of the annular airflow chamber 3, and the annular protrusion 21 is configured to enable the material strip to be closely attached to the surface of the annular protrusion 21 under the action of the air pressure in the annular airflow chamber 3 to form a diaphragm bending part.
According to the diaphragm forming die provided by the invention, the first pressing part is used for pressing to form the diaphragm ball top, and the second pressing part is used for pressing to form the diaphragm fixing part, so that the surfaces of the diaphragm ball top and the diaphragm fixing part have good flatness, and the thickness of the diaphragm is uniform. Particularly, when the diaphragm is molded by adopting PEEK (polyether ether ketone) material, the surfaces of the molded diaphragm ball top and the diaphragm fixing part can also have good flatness.
Generally, in order to facilitate the pressing, the base 2 is generally disposed right below the pressing unit 1, and the pressing is performed by pressing down. When the pressing is carried out, the pressing unit 1 moves downwards to be matched with the base 2 below, and then the pressing can be completed. Has the advantages of simple and rapid pressing mode.
When the vibrating diaphragm forming die is used, the material belt is horizontally placed on the surface of the base 2 in advance, one part of the material belt is positioned on the annular bulge 21, air flow is conveyed into the annular air flow cavity 3, the air flow acts on the annular bulge 21 through the annular air flow cavity 3, the material belt positioned on the annular bulge 21 can be tightly attached to the surface of the annular bulge 21 under the pressure action of the air flow, and the vibrating diaphragm bending part is formed by adopting an air pressure forming method. The annular protrusion 21 may have a circular structure or a track-type structure, so that the formed diaphragm bending portion may have a circular structure or a track-type structure.
Wherein, first pressfitting portion includes: a first pressing block 11 and a first overmold 12 coupled to a bottom of the first pressing block 11, the bottom of the first overmold 12 being configured to form a diaphragm dome of a predetermined shape. As shown in fig. 1, the entire width of the first press block 11 may be made larger than the width of the first die section 12, which is advantageous for stable press-fitting.
Wherein, the second pressfitting portion includes: and a second pressing block 13 arranged around the first pressing part, wherein a circle of second molding part 14 is arranged on the inner wall of the second pressing block 13, and the bottom of the second molding part 14 is configured to form a diaphragm fixing part with a preset shape. Furthermore, referring to fig. 1, the width of the second over-mold portion 14 may be designed to be smaller than the width of the second pressing block 13, so that the annular airflow cavity 3 between the first pressing portion and the second pressing portion is enlarged, which is beneficial for forming the folded ring portion of the diaphragm. Of course, as shown in fig. 2, the width of the second shroud portion 14 may be the same as the width of the second presser 13, but a space for avoiding the annular protrusion 21 may be provided below the second shroud portion 14.
In order to make the mold conveniently, as shown in fig. 2, the first pressing block 11 and the first mold covering portion 12 may be formed by integral forming, and the second pressing block 13 and the second mold covering portion 14 may also be formed by integral forming (when it is seen from fig. 2, the first pressing block 11 and the first mold covering portion are completely combined together, and the second pressing block and the second mold covering portion are completely combined together), so that the first pressing block 11 and the first mold covering portion 12 are firmly combined, and the second pressing block 13 and the second mold covering portion 14 are firmly combined together, when pressing the vibrating diaphragm, the first mold covering portion 12 and the second mold covering portion 14 can be stably pressed on the material belt, which is beneficial to improving the flatness of the vibrating diaphragm, so that the thickness of the formed vibrating diaphragm is uniform.
Of course, referring to fig. 1, the first pressing block 11 and the first mold portion 12 may be designed to be separated, and then the first pressing block 11 and the first mold portion 12 may be connected together. So that the first overmold portion 12 can be replaced to obtain a different diaphragm dome shape.
Moreover, the second pressing block 13 and the second overmold portion 14 may also be designed to be separated, and the second overmold portion 14 is connected to the inner wall of the second pressing block 13, at this time, the bottoms of the second pressing block 13 and the second overmold portion 14 should be kept in a flush state, so as to facilitate pressing. Wherein different diaphragm fixing part shapes can be obtained by replacing the second overmold part 14.
In the process of forming the diaphragm, both the first molding part 12 and the second molding part 14 can be used to heat the material tape, so that the first molding part 12 and the second molding part 14 have a certain heat resistance and will not stick to the material tape.
Alternatively, the first and second overmold portions 12, 14 are formed from a metal material or a plastic material or a rubber material. Further, a heat-resistant metal material or a heat-resistant plastic material may be preferable. The metal material may include any one of steel, copper, and aluminum, but is not limited to the above. The plastic material includes any one of polyimide, polyphenylene sulfide, polysulfones, aromatic polyamide, polyarylate, polyphenyl ester, polyaryletherketone, polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinylidene fluoride, polyperfluoroethylpropylene, tetrafluoroethylene-ethylene copolymer and soluble polytetrafluoroethylene, but is not limited to the above. The rubber material includes any one of silicon rubber and fluororubber, but is not limited to the above.
Referring to fig. 3, the method for forming a diaphragm according to an embodiment of the present invention includes:
and S1, attaching the tape to the base 2, and preheating the tape by the base 2.
When the pressing is carried out, the material belt is horizontally attached to the base 2, and the base 2 carries out preheating treatment on the material belt; the material belt can be of a single-layer structure or a multi-layer composite structure, but at least one layer of the material belt is made of PEEK materials.
S2, moving the pressing unit 1 towards the base 2 to make the first pressing part and the second pressing part contact with the material belt attached to the base 2 and heat the material belt; simultaneously, the air flow is introduced into the annular air flow chamber.
Wherein, first pressfitting portion includes: a first pressing block 11 and a first overmold 12 coupled to a bottom of the first pressing block 11, the bottom of the first overmold 12 being configured to form a diaphragm dome of a predetermined shape. The second nip portion includes: and a second pressing block 13 arranged around the first pressing part, wherein a circle of second molding part 14 is arranged on the inner wall of the second pressing block 13, and the bottom of the second molding part 14 is configured to form a diaphragm fixing part with a preset shape.
Specifically, the bottom of the first molding part 12 and the bottom of the second molding part 14 contact the surface of the tape attached to the base 2 and heat the tape; in this process, the gas flow is also introduced into the annular gas flow chamber 3.
S3, the pressing unit 1 continues to move toward the base 2, the first pressing portion presses the corresponding tape portion to form a vibrating diaphragm ball top with a predetermined shape, the second pressing portion presses the corresponding tape portion to form a vibrating diaphragm fixing portion with a predetermined shape, and the airflow in the annular airflow chamber 3 presses the corresponding tape portion to tightly adhere to the surface of the annular protrusion 21 to form a vibrating diaphragm bending portion.
Specifically, the bottom of the first mold covering part 12 is pressed against the corresponding tape part to form a diaphragm dome with a predetermined shape, the bottom of the second mold covering part 14 is pressed against the corresponding tape part to form a diaphragm fixing part with a predetermined shape, and the airflow in the annular airflow cavity 3 is pressed against the corresponding tape part to tightly adhere to the surface of the annular protrusion 21 to form a diaphragm bending part.
In fact, PEEK (polyetheretherketone) materials have good high temperature resistance, easy processability and high mechanical strength, and are often used in the preparation of loudspeaker diaphragms. However, when the diaphragm is formed by using the PEEK material in the prior art, the diaphragm ball top and the surface of the diaphragm fixing portion are very likely to cause wrinkles. The vibrating diaphragm forming die provided by the invention can effectively solve the defect problem by matching with a corresponding forming method.
The vibrating diaphragm manufactured by adopting the vibrating diaphragm forming die and the method comprises the following steps: the vibrating diaphragm ball top, the vibrating diaphragm bending ring part and the vibrating diaphragm fixing part are connected in sequence from inside to outside; wherein, the vibrating diaphragm is rolled over ring portion and can be circular structure or runway type structure, and vibrating diaphragm fixed part is rolled over ring portion shape phase-match and be the concentric structure with the vibrating diaphragm, and vibrating diaphragm bulb top is rolled over ring portion shape phase-match and concentric structure with the vibrating diaphragm. Fashioned vibrating diaphragm surfacing, when pasting DOME at the vibrating diaphragm ball-top, perhaps when being connected vibrating diaphragm fixed part and speaker shell, can not have the gap between two bonding faces, can closely bond, then the speaker that adopts this vibrating diaphragm has good waterproof nature and gas tightness.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A diaphragm forming die, characterized by, includes: the base is configured to be used for attaching the material belt and carrying out preheating treatment on the material belt;
the press-fit unit includes: the air flow device comprises a first pressing part and a second pressing part arranged around the first pressing part, wherein an annular air flow cavity with an open end is formed between the first pressing part and the second pressing part; the first pressing part is configured to be matched with the base to press the material belt part corresponding to the first pressing part into the diaphragm ball top, and the second pressing part is configured to be matched with the base to press the material belt part corresponding to the second pressing part into the diaphragm fixing part;
an annular bulge is arranged on one surface of the base and corresponds to the annular airflow cavity, and the annular bulge is configured to enable the material belt to be tightly attached to the surface of the annular bulge under the action of air pressure in the annular airflow cavity so as to form a diaphragm bending part.
2. The diaphragm forming mold of claim 1, wherein the first pressing portion includes: the vibration isolator comprises a first pressing block and a first cladding part combined with the bottom of the first pressing block, wherein the bottom of the first cladding part is configured to form a diaphragm ball top with a preset shape.
3. The diaphragm forming die of claim 2, wherein the first pressing block and the first cover portion are formed by integral forming; or,
the first pressing block is fixedly connected with the first cladding part.
4. The diaphragm forming mold of claim 2, wherein the first mold covering portion is made of a metal material, a plastic material, or a rubber material.
5. The diaphragm forming mold of claim 1, wherein the second pressing portion includes: and the second pressing block is arranged around the first pressing part, a circle of second cladding part is arranged on the inner wall of the second pressing block, and the bottom of the second cladding part is configured to form a diaphragm fixing part in a preset shape.
6. The diaphragm forming die of claim 5, wherein the second pressing block and the second over-mold portion are formed by integral forming; or,
the second pressing block is fixedly connected with the second cladding part.
7. The diaphragm forming mold of claim 5, wherein the second overmold portion is made of a metal material, a plastic material, or a rubber material.
8. A diaphragm molding method, characterized in that the diaphragm molding die of any one of claims 1 to 7 is used, comprising:
attaching a material belt to the base, and carrying out preheating treatment on the material belt by the base;
the pressing unit moves towards the direction of the base, so that the first pressing part and the second pressing part are in contact with the material belt attached to the base and heat the material belt; simultaneously, introducing airflow into the annular airflow cavity;
the pressing unit continues to move towards the direction of the base, the first pressing part presses the corresponding material belt part to form a vibrating diaphragm ball top in a preset shape, the second pressing part presses the corresponding material belt part to form a vibrating diaphragm fixing part in a preset shape, and the air flow in the annular air flow cavity presses the corresponding material belt part to be tightly attached to the surface of the annular bulge to form a vibrating diaphragm bending ring part.
9. The diaphragm forming method of claim 8, wherein the first pressing portion includes: the vibration isolator comprises a first pressing block and a first cladding part combined with the bottom of the first pressing block, wherein the bottom of the first cladding part is configured to form a diaphragm ball top with a preset shape.
10. The diaphragm forming method of claim 8, wherein the second pressing portion includes: and the second pressing block is arranged around the first pressing part, a circle of second cladding part is arranged on the inner wall of the second pressing block, and the bottom of the second cladding part is configured to form a diaphragm fixing part in a preset shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810724724.9A CN109040915B (en) | 2018-07-04 | 2018-07-04 | Vibrating diaphragm forming die and vibrating diaphragm forming method |
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| CN201810724724.9A CN109040915B (en) | 2018-07-04 | 2018-07-04 | Vibrating diaphragm forming die and vibrating diaphragm forming method |
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| CN109040915B true CN109040915B (en) | 2020-07-24 |
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| CN110996245B (en) * | 2019-11-11 | 2021-02-19 | 歌尔股份有限公司 | Vibrating diaphragm forming die and vibrating diaphragm forming method |
| WO2021134247A1 (en) * | 2019-12-30 | 2021-07-08 | 瑞声声学科技(深圳)有限公司 | Diaphragm forming mold |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| JP4482372B2 (en) * | 2004-05-13 | 2010-06-16 | パイオニア株式会社 | Method for manufacturing diaphragm for electroacoustic transducer |
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| JP2002305798A (en) * | 2001-04-06 | 2002-10-18 | Citizen Electronics Co Ltd | Forming method for diaphragm for small-sized sounder |
| CN1388727A (en) * | 2001-05-28 | 2003-01-01 | 日本先锋公司 | Method for prodcing vibrating plate of loudspeaker and vibrating plate for loudspeaker |
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