CN114630245A - Loudspeaker diaphragm - Google Patents
Loudspeaker diaphragm Download PDFInfo
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- CN114630245A CN114630245A CN202210361776.0A CN202210361776A CN114630245A CN 114630245 A CN114630245 A CN 114630245A CN 202210361776 A CN202210361776 A CN 202210361776A CN 114630245 A CN114630245 A CN 114630245A
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- Prior art keywords
- forming
- foaming
- layer
- base
- filling
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Links
- 239000000463 material Substances 0.000 claims abstract description 117
- 238000005187 foaming Methods 0.000 claims description 62
- 239000000835 fiber Substances 0.000 claims description 49
- 239000004744 fabric Substances 0.000 claims description 30
- 239000000853 adhesive Substances 0.000 claims description 19
- 230000001070 adhesive effect Effects 0.000 claims description 19
- 239000003292 glue Substances 0.000 claims description 17
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- 238000004140 cleaning Methods 0.000 claims description 10
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- 239000002994 raw material Substances 0.000 claims description 9
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- 238000004519 manufacturing process Methods 0.000 claims description 6
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- 238000009941 weaving Methods 0.000 claims description 6
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
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- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000000945 filler Substances 0.000 description 7
- 238000007731 hot pressing Methods 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
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Images
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
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/025—Diaphragms comprising polymeric materials
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/029—Diaphragms comprising fibres
Abstract
The invention discloses a loudspeaker diaphragm, comprising: the base layer is composed of a plurality of convex parts and concave parts which are arranged in sequence, and the middle filling layer is used for filling and arranging between the two base layers; the surface filling layer is used for filling and arranging on the surface of the base layer, and the surface filling layer and the middle filling layer are respectively positioned on two opposite sides of the single base layer. The invention changes the plane structure of the traditional loudspeaker dome into a 3D structure, and improves the structural strength of the dome under the conditions of the same material and the same thickness.
Description
Technical Field
The invention relates to the technical field of loudspeakers, in particular to a loudspeaker diaphragm and a related preparation method thereof.
Background
Traditional speaker dome is formed by the combination of the different material planes of multilayer, and its intensity depends on each material nature and thickness, and present speaker is more and more high to frequency response high frequency ductility demand, and under the unable circumstances that changes of material and thickness, current structure and molding can't continue to promote dome intensity.
As shown in fig. 1, the cross section of the conventional dome of a speaker is generally a three-layer planar structure, the surface skin material is generally made of a high-strength and light-weight metal material (e.g., aluminum), and the middle is filled with a light-weight foam structure (e.g., PMI) as a filler, and this structure can only increase the material thickness and replace the material in order to continuously improve the structural strength, so that the mass is increased, the midrange loudness of the speaker is reduced, and the dome cannot effectively suppress the high-frequency attenuation caused by the split vibration because the mass is increased without increasing the thickness.
Thus, there is a need for a loudspeaker diaphragm that solves the above problems.
Disclosure of Invention
The invention provides a loudspeaker diaphragm and a corresponding loudspeaker, which avoid the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a loudspeaker diaphragm comprising:
a base layer which is composed of a plurality of convex parts and concave parts which are arranged in sequence,
the middle filling layer is used for filling and arranging between the two base layers;
and the surface filling layer and the middle filling layer are respectively positioned at two opposite sides of the single base layer.
In some embodiments, the positions of the protruding portions of the two base layers correspond to each other and face the same side, and the positions of the recessed portions of the two base layers correspond to each other and face the same side.
In several embodiments, the positions of the protruding portions of the two base layers correspond to and face the two opposite sides, and the positions of the recessed portions of the two base layers correspond to and face the two opposite sides.
In some embodiments, the protrusion and the recess are arc-shaped or polygonal.
In several embodiments, the surface filling layer forms a flat end surface on the surface of the base layer.
In several embodiments, the intermediate filling layer is made of a foamed filling material or a fibrous filling material;
the foaming filling material comprises a foaming polymer and a fiber body added in the foaming polymer;
the fiber filling material comprises base cloth woven by a fiber body and thermosetting resin for infiltrating the base cloth;
wherein the foaming polymer comprises one or more of foaming PMI, foaming PET, foaming PPS, foaming PI and foaming PP;
the fiber body comprises one or more of carbon fiber, glass fiber and graphene fiber.
Through above-mentioned middle filling layer, increase structural strength, promote speaker high frequency response.
In several embodiments, the surface filling layer is also made of a foamed filling material or a fibrous filling material.
Through above-mentioned surface filling layer, increase structural strength, promote speaker high frequency response.
In several embodiments, the surface filling layer is a glue layer.
Increase whole damping through above-mentioned glue film, for the speaker provides better tone quality, glue layer material is like glue such as UV glue, silica gel, moisture solidification.
In several embodiments, the speaker diaphragm is prepared by the following method:
s100: forming the base layer;
s101: putting the flat base layer raw material into a forming die, and performing punch forming on the convex part and the concave part to form a base layer with a three-dimensional structure;
s102: carrying out rough treatment on two opposite surfaces of the base layer;
s103: cleaning the surface of the base layer;
s200: forming the middle filling layer, including forming the foaming filling material and the fiber filling material;
S201A: forming a foaming filling material, namely adding a fiber body into a foaming polymer, foaming and forming, cutting into a sheet material with a certain thickness, and forming the sheet material into a three-dimensional structure;
S201B: forming a fiber filling material, namely weaving a fiber body into a planar base cloth, putting the base cloth into a three-dimensional forming die, injecting thermosetting resin under high pressure, and completely immersing the base cloth into the thermosetting resin to form a material with a three-dimensional structure;
s202: spraying adhesive on the inner surface of the base layer, putting the three-dimensional structure material formed in S201A or S201B between the base layers, and compacting, curing and forming;
s300: forming the surface filling layer;
s301: and placing the surface filling layer into the outer surface of the base layer for gluing, curing and molding.
And, another preparation method is also provided, comprising:
s100: forming the base layer;
s101: carrying out rough treatment on two opposite surfaces of a flat base raw material;
s102: cleaning the surface of the base layer;
s200: forming the middle filling layer, including forming the foaming filling material and the fiber filling material;
S201A: forming the foaming filling material, namely adding a fiber body into the foaming polymer, foaming and forming, and cutting into a sheet material with a certain thickness;
S201B: forming a fiber filling material, namely weaving a fiber body into a planar base cloth, placing the base cloth into a mold, injecting thermosetting resin under high pressure, and completely immersing the base cloth into the thermosetting resin to form a sheet material;
s202: carrying out adhesive spraying treatment on the inner surface of the base layer, putting the sheet-shaped material formed in S201A or S201B between the base layers, compacting and curing, and then carrying out hot press forming of the three-dimensional structure on the whole;
s300: forming the surface filling layer;
s301: and placing the surface filling layer into the outer surface of the base layer for gluing, curing and molding.
And, another two preparation methods are also provided, comprising:
s100: forming the base layer;
s101: carrying out rough treatment on two opposite surfaces of the flat and straight base raw material;
s102: cleaning the surface of the base layer;
s103: placing the two base layers into a forming mold;
s200: forming the middle filling layer, including forming the foaming filling material and the fiber filling material;
S201A: forming a foaming filling material, namely adding a fibrous body into a foaming polymer to obtain a foaming material, injecting the obtained foaming material into a cavity between two base layers in a forming die, foaming and curing, and carrying out hot press forming through the forming die;
S201B: forming a fiber filling material, namely weaving a fiber body into a planar base cloth, placing the base cloth between two base layers in a forming die, injecting thermosetting resin to fill a gap, curing, and carrying out hot press forming through the forming die;
s300: forming the surface filling layer;
s301: and placing the surface filling layer into the outer surface of the base layer for gluing, curing and molding.
The invention has the following beneficial effects:
the invention changes the plane structure of the traditional loudspeaker dome into a 3D structure, and improves the structural strength of the dome under the conditions of the same material and the same thickness.
Drawings
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not to be considered limiting of the scope of the present disclosure.
Fig. 1 schematically shows a sectional structure of a conventional speaker dome;
fig. 2 schematically shows a cross-sectional structure of a speaker diaphragm in embodiment 1;
fig. 3 schematically shows a cross-sectional structure of a speaker diaphragm in embodiment 2;
fig. 4 schematically shows a sectional structure of a speaker diaphragm in embodiment 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting and/or restricting the invention.
For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "relative", "front-back-left-right" and the like indicate relative or absolute arrangements, and indicate not only such arrangements in a strict sense but also a state of being relatively displaced with a tolerance or an angle or a distance to the extent that the same function can be obtained.
As shown in fig. 1, a conventional loudspeaker dome is composed of two surface skin layers 1 and a middle inner filling layer 2, wherein the surface skin layer 1 is made of metal such as aluminum, and the inner filling layer 2 is made of foaming material such as polymethacrylimide, i.e., foaming PMI.
Example 1
As shown in fig. 1, the speaker diaphragm in this embodiment, specifically the dome position, is composed of two base layers 10, an intermediate filling layer 20, and two surface filling layers 30.
Specifically, the base layer 10 is made of light metal such as aluminum, the base layer 10 is composed of a plurality of protruding portions 11 and recessed portions 12 which are sequentially arranged, the protruding portions 11 and the recessed portions 12 are both arc-shaped, namely, the base layer 10 is pressed to be in a sine curve shape, the height, the width and the like of the protruding portions 11 and the recessed portions 12 formed by the base layer can be adjusted through frequency response curves of different requirements of each type of loudspeaker, and the purpose that the frequency response high-frequency cut-off peak of each type of loudspeaker can be improved is achieved.
Also, here, the positions of the protrusions 11 in the two base layers 10 correspond to each other and face the same side, and the positions of the depressions 12 in the two base layers 10 correspond to each other and face the same side, that is, the two base layers 10 are identical.
The middle filling layer 20 is used for filling and disposing between the two base layers 10, the middle filling layer 20 includes a base material and a polymer coated on the surface of the base material, and specifically, the following structure is adopted:
in the polymerization of the polymer: the composite material is prepared by adding glass fiber or carbon fiber, graphene and other (short glass fiber or long glass fiber) materials into materials such as polymethacrylimide (foaming PMI), polyethylene terephthalate (foaming PET), polyphenylene sulfide (foaming PPS), polyimide (foaming PI), polypropylene (foaming PP) and the like, and mixing the materials, namely, the base material is glass fiber or carbon fiber, graphene and other (short glass fiber or long glass fiber) materials.
Or, the base material adopts multilayer carbon fiber or glass fiber material, the base material is woven into planar special cloth, the base material is placed into a corresponding modeling mould, thermosetting resin such as epoxy resin is injected at high pressure, and the whole special cloth is completely immersed into the epoxy resin for molding.
The surface filling layer 30 is used for filling and setting up on basic unit 10 surface, surface filling layer 30 and middle filling layer 20 are located the relative both sides of single basic unit 10 respectively, surface filling layer 30 can adopt like middle filling layer 20's material, increase structural strength, promote speaker high frequency response, also can adopt the glue film of glue such as UV glue, silica gel, moisture curing to increase whole damping, provide better tone quality for the speaker, can fill at basic unit 10 surface depression according to specific demands and add different materials, become smooth terminal surface with the surface filling of substrate 10, reach best tone quality effect.
Example 2
Unlike embodiment 1, in this embodiment, there is a difference in the distribution of the two base layers 10, where the positions of the protrusions 11 in the two base layers 10 correspond to and face opposite sides, respectively, and the positions of the recesses 12 in the two base layers 10 correspond to and face opposite sides, respectively. That is, the two substrates 10 are arranged in a mirror-symmetrical distribution.
Example 3
Unlike embodiment 2, in this embodiment, the shape of the base layer 10 is different, and here, the convex portion 11 and the concave portion 12 are both in an isosceles trapezoid shape, and like a sine curve, the convex portion and the concave portion are symmetrical and uniform, and it should be noted that the convex portion 11 and the concave portion 12 may also be in a relatively symmetrical polygonal shape such as an isosceles triangle.
Of course, the speaker products having the speaker domes of embodiments 1 to 3 also belong to the scope of the present invention.
Example 4
In this embodiment, a method for manufacturing the speaker diaphragm is provided, which mainly comprises the following steps.
Firstly, forming a base layer, namely putting a flat base layer raw material such as an aluminum sheet into a forming die, and performing punch forming on a convex part and a concave part to form the base layer with a three-dimensional structure, wherein the three-dimensional structure is as follows, namely the convex part 11 and the concave part 12; then, two opposite surfaces of the base layer are subjected to rough treatment for increasing the contact area with the internal and external fillers, enhancing the adhesion force and preventing delamination; finally, cleaning the surface of the base layer; the order of the three-dimensional structure forming and the surface roughening treatment can be interchanged, and subsequent use is not affected.
Then the forming of the middle filling layer mainly comprises the forming of the foaming filling material and the fiber filling material.
For the forming of the foaming filling material, a fibrous body is required to be added into a foaming polymer for foaming forming, then the fibrous body is cut into a sheet material with a certain thickness, then the sheet material is subjected to the forming of a three-dimensional structure, and the three-dimensional structure forming can be carried out by adopting a CNC (computerized numerical control) or hot-press forming mode;
and after the foaming filling material is subjected to three-dimensional molding, spraying a proper adhesive on the upper surface of the base layer positioned below, putting the foaming filling material of the three-dimensional mechanism into the base layer, pre-pressing, spraying the adhesive on the lower surface of the base layer positioned above, adhering the adhesive with the intermediate filling material, and pressing.
For the molding of the fiber filling material, the fiber body is firstly woven into a planar base cloth, the base cloth is placed into a three-dimensional molding die, namely the base cloth is attached and placed into the die with a corresponding three-dimensional shape, thermosetting resin is injected under high pressure, and the base cloth is completely immersed into the thermosetting resin to form the material with a three-dimensional structure;
and for the fiber filling material, after three-dimensional forming, spraying adhesives on two opposite surfaces of the two base layers, putting the fiber filling material with a three-dimensional structure, compacting and curing, and scraping redundant surface overflow materials.
And finally, forming the surface filling layer.
When the surface filling layer is made of the same material as the middle filling layer, adhesives are sprayed on the other two opposite surfaces of the two base layers, fiber filling materials are put into the adhesives, and after the adhesives are compressed and cured, redundant surface overflow materials are scraped.
When the surface filler is a glue layer, corresponding damping glue is sprayed in the filling area, and after solidification, redundant surface overflow materials are scraped.
Example 5
In this embodiment, a second manufacturing method of the speaker diaphragm is provided, which mainly comprises the following steps.
Firstly, forming a base layer, wherein two opposite surfaces of a flat and straight base layer raw material, such as an aluminum sheet, are subjected to rough treatment to increase the contact area with internal and external fillers, strengthen the adhesion force and prevent delamination; and finally, cleaning the surface of the base layer.
Then the forming of the middle filling layer mainly comprises the forming of the foaming filling material and the fiber filling material.
For the formation of the foamed filling material, it is necessary to add a fibrous body to a foamed polymer, perform foam formation, and then cut it into a sheet-like material having a certain thickness.
For the molding of the fiber filling material, it is necessary to weave the fiber body into a planar base fabric, place the base fabric in a mold, inject thermosetting resin under high pressure, and completely immerse the base fabric in the thermosetting resin to mold the sheet material.
Spraying adhesive on two opposite surfaces of the two base layers, putting flaky fiber filling materials or foaming filling materials, pressing and curing, scraping redundant surface overflow materials, and then carrying out hot-pressing three-dimensional structure molding in a hot-pressing mold.
And finally, forming the surface filling layer.
When the surface filling layer is made of the same material as the middle filling layer, adhesives are sprayed on the other two opposite surfaces of the two base layers, fiber filling materials are put in the adhesives, after the adhesives are compressed and cured, redundant surface overflow materials are scraped off, and hot-pressing three-dimensional structure forming is carried out in a hot-pressing die.
When the surface filler is a glue layer, corresponding damping glue is sprayed in the filling area, and after solidification, redundant surface overflow materials are scraped.
Example 6
In this embodiment, a third method for manufacturing the speaker diaphragm is provided, which mainly comprises the following steps.
Firstly, forming a base layer, wherein two opposite surfaces of a flat and straight base layer raw material, such as an aluminum sheet, are subjected to rough treatment to increase the contact area with internal and external fillers, strengthen the adhesion force and prevent delamination; and then cleaning the surface of the base layer, spraying an adhesive on the surface of the base layer after cleaning is finished, and placing the two base layers into corresponding moulds for later use.
Then the forming of the middle filling layer mainly comprises the forming of the foaming filling material and the fiber filling material.
For the formation of the foamed filling material, it is necessary to add a fibrous body to a foamed polymer to form a liquid foamed material, then inject the foamed material into a cavity between two substrates in a mold, foam-form and cure the foamed material directly inside the mold, and perform integral formation of a three-dimensional structure under a pressure such as hot pressing.
For the forming of the fiber filling material, the fiber body needs to be woven into the planar base cloth, the base layer can be subjected to pressure forming of a three-dimensional structure firstly, one base layer is placed into a mold firstly, then the fiber filling material is placed in the middle of the base layer, the other base layer is placed, and gaps among the three are filled and cured through epoxy resin.
And finally, forming the surface filling layer.
When the surface filling layer is made of the same material as the middle filling layer, adhesives are sprayed on the other two opposite surfaces of the two base layers, fiber filling materials are put in the adhesives, after the adhesives are compressed and cured, redundant surface overflow materials are scraped off, and hot-pressing three-dimensional structure forming is carried out in a hot-pressing die.
When the surface filler is a glue layer, corresponding damping glue is sprayed in the filling area, and after solidification, redundant surface overflow materials are scraped.
The present invention describes preferred embodiments, including the best mode known to the inventors for carrying out the invention. Of course, variations of these preferred embodiments will be apparent to those skilled in the art. The inventors envision that the variations may be used as appropriate by those skilled in the art and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications encompassed within the spirit and scope of the invention as defined by the claims. Moreover, any and all possible variations of the above-described elements are encompassed by the present invention unless otherwise indicated herein or otherwise clearly contradicted by context.
Claims (10)
1. A loudspeaker diaphragm, comprising:
a base layer which is composed of a plurality of convex parts and concave parts which are arranged in sequence,
the middle filling layer is used for filling and arranging between the two base layers;
and the surface filling layer and the middle filling layer are respectively positioned at two opposite sides of the single base layer.
2. A loudspeaker diaphragm according to claim 1 wherein the protrusions of the two substrates are located in a corresponding and facing relationship, and the recesses of the two substrates are located in a corresponding and facing relationship.
3. A loudspeaker diaphragm according to claim 1 wherein the protrusions of the two base layers are located correspondingly and facing opposite sides of the diaphragm, and the recesses of the two base layers are located correspondingly and facing opposite sides of the diaphragm.
4. A loudspeaker diaphragm according to claim 1 wherein the raised portion and the recessed portion are each arcuate or polygonal in shape.
5. A loudspeaker diaphragm according to claim 4 wherein the surface filling layer forms a planar end surface on the surface of the substrate.
6. The loudspeaker diaphragm of claim 5 wherein the middle filling layer and the surface filling layer are both made of foam filling material or fiber filling material;
the foaming filling material comprises a foaming polymer and a fiber body added in the foaming polymer;
the fiber filling material comprises base cloth woven by fiber bodies and thermosetting resin for infiltrating the base cloth;
wherein the foaming polymer comprises one or more of foaming PMI, foaming PET, foaming PPS, foaming PI and foaming PP;
the fiber body comprises one or more of carbon fiber, glass fiber and graphene fiber.
7. A loudspeaker diaphragm according to claim 5 wherein the surface filling layer is a glue layer comprising one or more of UV glue, silica gel, moisture cured glue.
8. A loudspeaker diaphragm according to claim 7, characterised by the following manufacturing method:
s100: forming the base layer;
s101: putting the flat and straight base layer raw material into a forming die, and performing punch forming on the convex part and the concave part to form a base layer with a three-dimensional structure;
s102: carrying out rough treatment on two opposite surfaces of the base layer;
s103: cleaning the surface of the base layer;
s200: forming the middle filling layer, including forming the foaming filling material and the fiber filling material;
S201A: forming a foaming filling material, namely adding a fiber body into a foaming polymer, foaming and forming, cutting into a sheet material with a certain thickness, and forming the sheet material into a three-dimensional structure;
S201B: forming a fiber filling material, namely weaving a fiber body into a planar base cloth, putting the base cloth into a three-dimensional forming die, injecting thermosetting resin under high pressure, and completely immersing the base cloth into the thermosetting resin to form a material with a three-dimensional structure;
s202: spraying adhesive on the inner surface of the base layer, putting the three-dimensional structure material formed in S201A or S201B between the base layers, and compacting, curing and forming;
s300: forming the surface filling layer;
s301: and placing the surface filling layer into the outer surface of the base layer for gluing, curing and molding.
9. A loudspeaker diaphragm according to claim 7, characterised by the following manufacturing method:
s100: forming the base layer;
s101: carrying out rough treatment on two opposite surfaces of the flat and straight base raw material;
s102: cleaning the surface of the base layer;
s200: forming the middle filling layer, including forming the foaming filling material and the fiber filling material;
S201A: forming the foaming filling material, namely adding a fiber body into the foaming polymer, foaming and forming, and cutting into a sheet material with a certain thickness;
S201B: forming a fiber filling material, namely weaving a fiber body into a planar base cloth, placing the base cloth into a mold, injecting thermosetting resin under high pressure, and completely immersing the base cloth into the thermosetting resin to form a sheet material;
s202: carrying out adhesive spraying treatment on the inner surface of the base layer, putting the sheet-shaped material formed in S201A or S201B between the base layers, compacting and curing, and carrying out hot press forming of the three-dimensional structure on the whole;
s300: forming the surface filling layer;
s301: and placing the surface filling layer into the outer surface of the base layer for gluing, curing and molding.
10. A loudspeaker diaphragm according to claim 7, characterised by the following manufacturing method:
s100: forming the base layer;
s101: carrying out rough treatment on two opposite surfaces of the flat and straight base raw material;
s102: cleaning the surface of the base layer;
s103: placing the two base layers into a forming mold;
s200: forming the middle filling layer, including forming the foaming filling material and the fiber filling material;
S201A: forming a foaming filling material, namely adding a fibrous body into a foaming polymer to obtain a foaming material, injecting the obtained foaming material into a cavity between two base layers in a forming die, foaming and curing, and carrying out hot press forming through the forming die;
S201B: forming a fiber filling material, namely weaving a fiber body into a planar base cloth, placing the base cloth between two base layers in a forming die, injecting thermosetting resin to fill a gap, curing, and carrying out hot press forming through the forming die;
s300: forming the surface filling layer;
s301: and placing the surface filling layer into the outer surface of the base layer for gluing, curing and molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210361776.0A CN114630245B (en) | 2022-04-07 | 2022-04-07 | Loudspeaker diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210361776.0A CN114630245B (en) | 2022-04-07 | 2022-04-07 | Loudspeaker diaphragm |
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| CN114630245B CN114630245B (en) | 2024-03-29 |
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| CN207251841U (en) * | 2017-09-28 | 2018-04-17 | 常州市友晟电子有限公司 | A kind of carbon fiber top dome |
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| CN114630245B (en) | 2024-03-29 |
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