CN102295806B - Speaker flat plate diaphragm made of vegetable fiber reinforced polypropylene composite material - Google Patents
Speaker flat plate diaphragm made of vegetable fiber reinforced polypropylene composite material Download PDFInfo
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- CN102295806B CN102295806B CN 201110195438 CN201110195438A CN102295806B CN 102295806 B CN102295806 B CN 102295806B CN 201110195438 CN201110195438 CN 201110195438 CN 201110195438 A CN201110195438 A CN 201110195438A CN 102295806 B CN102295806 B CN 102295806B
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Abstract
The invention relates to a speaker flat plate diaphragm made of a vegetable fiber reinforced polypropylene composite material and belongs to the field of design and manufacturing of an electroacoustic device and an audio electronic product. The speaker flat plate diaphragm comprises the following raw materials in percentage by mass: 80 percent to 90 percent of polypropylene resin, 9 percent to 15 percent of vegetable fibers and 1 percent to 5 percent of nano inorganic additive. The speaker flat plate diaphragm has the beneficial effects that the adopted polypropylene resin raw material is supplied sufficiently and has low cost; compared with a solid material with the same size of the speaker flat plate diaphragm, the density of the speaker flat plate diaphragm is greatly reduced; and the rigidity of the speaker flat plate diaphragm is obviously improved and is easy for mass production and performance parameter control.
Description
Technical field
The invention belongs to electro-acoustic element and acoustic product manufactures and designs the field, be specifically related to a kind of diaphragm of loudspeaker, especially a kind of acrylic resin that adopts is that the matrix material manufacturing thickness of matrix is ultra-thin, specific rigidity is high, the speaker plate diaphragm of light weight.
Background technology
The performance of the diaphragm of loudspeaker has crucial influence to the tonequality of speaker.After the size shape of vibrating diaphragm was confirmed, material that vibrating diaphragm is selected for use and moulding process just had very important influence to the performance and the tonequality of speaker.At present, it perhaps is the main cone of processing with the wood fibre that the material of the diaphragm of loudspeaker is mainly used wood fibre, needs to consume a large amount of forest reserves, is unfavorable for the trend of environmental protection and sustainable development.
In addition, traditional speaker adopts awl benzvalene form vibrating diaphragm, and the occupation of land space is big, is difficult to satisfy consumption electronic product, like " panelized ", the trend of " lightening " of flat panel TV, computer, multi-media audiovisual product etc.Though reducing the height of awl benzvalene form vibrating diaphragm can be so that the attenuation of speaker integral thickness, the bass effect of speaker and tonequality reductive are cashed variation thereupon.
Guarantee excellent tonequality simultaneously in order to satisfy the speaker slimming, need the loudspeaker diaphragm materials of development of new.
Summary of the invention
The speaker plate diaphragm that the present invention provides a kind of vegetable fibre reinforced polypropylene compound material to make is to solve the audio variation of speaker, the problem that distortion increases.Adopt that acrylic resin (the English PP of abbreviation) is that the matrix material manufacturing thickness of matrix is ultra-thin, specific rigidity is high, light weight, the cellular foam structure of wide, the inner uniform distribution of Hz-KHz.
The technical scheme that the present invention adopts is: the raw material by following mass percent is formed:
Acrylic resin: 80% ~ 90%;
Vegetable fibre: 9% ~ 15%;
Nano inorganic additive: 1% ~ 5%;
Described vegetable fibre is flaxen fiber or bamboo fibers, wherein:
The bamboo fibers diameter between 5mm ~ 5.5mm, length 2 ~ 6mm;
The flaxen fiber diameter between 1.6mm ~ 5mm, length 10 ~ 20mm;
Described nano inorganic additive is a Nano particles of calcium carbonate, and mean diameter is 20 ~ 50nm.
The method of manufacture of the speaker plate diaphragm that vegetable fibre reinforced polypropylene compound material of the present invention is made comprises the following steps:
(1), according to formula rate acrylic resin, vegetable fibre and nano inorganic additive are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine;
(2), blank is put into special-purpose honeycomb hole foaming and forming apparatus, said device is heated to 120 ℃ ~ 160 ℃ and rotate the inner screw rod of said device, the plasticizing of blank melted by heating forms the matrix of said vibrating diaphragm; It is inner that high-pressure carbon dioxide gas is injected into said device; Said carbon dioxide gas pressure is 15 ~ 20Mpa, forms polymkeric substance/gas homogeneous system with matrix, subsequently; Open pressure release valve removal carbon dioxide gas pressure; Thereby, after said device is cooled to 20 ℃ ~ 25 ℃, take out matrix at the equally distributed cellular abscess of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size.
The internal structure of said vibrating diaphragm is equally distributed cellular foam structure, and cell diameter is between 10 μ m ~ 100 μ m, and cell density is greater than 10
8Individual/cm
3Compare with the solid material under the same terms, the structure of said vibrating diaphragm has that quality alleviates significantly, specific rigidity is high, than advantages such as spring rate significantly improve.As the matrix of said vibrating diaphragm, the diaphragm of loudspeaker inherent damping that acrylic resin is made is good, does not receive the influence of ambient moisture, processes and be controlled to the molded dimension error easily, is a kind of comparatively ideal diaphragm of loudspeaker starting material.But because acrylic resin is linear, crystalline polymer, during molten state, the intensity of melt is low; In order to guarantee to obtain equally distributed cellular foam structure, need to add other raw materials so that improve the melt strength of PP resin.
The beneficial effect that the present invention is compared with prior art brought is:
1, the PP resin that is adopted is the linear polymer of a kind of high-density, unprotected side chain, high crystalline, has excellent comprehensive performances, numerous industries such as widespread use electronic apparatus, household electrical appliances, automobile, packing, food, and its raw material supply is sufficient, with low cost; The bamboo of China, hemp resource are extremely abundant, are one of countries that bamboo, fiber crops distribution are the most in the world, output is maximum.Bamboo, flaxen fiber vegetative period is short, growing environment is less demanding; Process of growth need not agricultural chemicals and chemical fertilizer; Receptivity to carbonic acid gas is strong, has the effect that slows down " Greenhouse effect "; Renewable recycle; Has the favorable mechanical physicals; Therefore, vibrating diaphragm according to the invention substitutes the cone material, can save valuable forest timber resource in a large number.
2, the inside of said vibrating diaphragm is the honeycomb cavernous structure, so the solid material of the same size of density greatly reduces, but its rigidity significantly improves.Test shows, compares the low-frequency cut-off frequency F of vibrating diaphragm according to the invention with the conventional paper cone material
0Reduced by 18% ~ 22%;
3, said vibrating diaphragm can adopt injection moulding, plastics molding process processing such as extrude, and is easy to produce in enormous quantities with performance perameter and controls.
Embodiment
Embodiment 1
Form by the raw material of following mass percent:
Acrylic resin: 90%;
Bamboo fibers diameter 5mm, length 2mm:9%;
Nano particles of calcium carbonate, mean diameter are 20nm:1%;
The method of manufacture of the speaker plate diaphragm that vegetable fibre reinforced polypropylene compound material of the present invention is made comprises the following steps:
(1), according to formula rate acrylic resin, bamboo fibers and Nano particles of calcium carbonate are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine;
(2), blank is put into special-purpose honeycomb hole foaming and forming apparatus, said device is heated to 120 ℃ and rotate the inner screw rod of said device, the plasticizing of blank melted by heating forms the matrix of said vibrating diaphragm; It is inner that high-pressure carbon dioxide gas is injected into said device; Said carbon dioxide gas pressure is 15Mpa, forms polymkeric substance/gas homogeneous system with matrix, subsequently; Open pressure release valve removal carbon dioxide gas pressure; Thereby, after said device is cooled to 20 ℃, take out matrix at the equally distributed cellular abscess of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size.
Embodiment 2
Form by the raw material of following mass percent:
Acrylic resin: 85%;
Bamboo fibers diameter 5.25mm, length 4mm:12%;
Nano particles of calcium carbonate, mean diameter are 35nm:3%;
The method of manufacture of the speaker plate diaphragm that vegetable fibre reinforced polypropylene compound material of the present invention is made comprises the following steps:
(1), according to formula rate acrylic resin, bamboo fibers and Nano particles of calcium carbonate are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine;
(2), blank is put into special-purpose honeycomb hole foaming and forming apparatus, said device is heated to 140 ℃ and rotate the inner screw rod of said device, the plasticizing of blank melted by heating forms the matrix of said vibrating diaphragm; It is inner that high-pressure carbon dioxide gas is injected into said device; Said carbon dioxide gas pressure is 17.5Mpa, forms polymkeric substance/gas homogeneous system with matrix, subsequently; Open pressure release valve removal carbon dioxide gas pressure; Thereby, after said device is cooled to 22.5 ℃, take out matrix at the equally distributed cellular abscess of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size.
Embodiment 3
Form by the raw material of following mass percent:
Acrylic resin: 80%;
Bamboo fibers diameter 5.5mm, length 6mm:15%;
Nano particles of calcium carbonate, mean diameter are 50nm:5%;
The method of manufacture of the speaker plate diaphragm that vegetable fibre reinforced polypropylene compound material of the present invention is made comprises the following steps:
(1), according to formula rate acrylic resin, bamboo fibers and Nano particles of calcium carbonate are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine;
(2), blank is put into special-purpose honeycomb hole foaming and forming apparatus, said device is heated to 160 ℃ and rotate the inner screw rod of said device, the plasticizing of blank melted by heating forms the matrix of said vibrating diaphragm; It is inner that high-pressure carbon dioxide gas is injected into said device; Said carbon dioxide gas pressure is 20Mpa, forms polymkeric substance/gas homogeneous system with matrix, subsequently; Open pressure release valve removal carbon dioxide gas pressure; Thereby, after said device is cooled to 25 ℃, take out matrix at the equally distributed cellular abscess of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size.
The internal structure of said vibrating diaphragm is equally distributed cellular foam structure, and cell diameter is between 10 μ m ~ 100 μ m, and cell density is greater than 10
8Individual/cm
3
Embodiment 4
Bamboo fibers among the embodiment 1 is replaced to flaxen fiber diameter 1.6mm, length 10mm.
Embodiment 5
Bamboo fibers among the embodiment 2 is replaced to flaxen fiber diameter 3.3mm, length 15mm.
Embodiment 6
Bamboo fibers among the embodiment 3 is replaced to flaxen fiber diameter 5mm, length 20mm.
Claims (2)
1. the speaker plate diaphragm made of a vegetable fibre reinforced polypropylene compound material is characterized in that being made up of the raw material of following mass percent:
Acrylic resin: 80% ~ 90%;
Vegetable fibre: 9% ~ 15%, this vegetable fibre is flaxen fiber or bamboo fibers, wherein:
The bamboo fibers diameter between 5mm ~ 5.5mm, length 2 ~ 6mm;
The flaxen fiber diameter between 1.6mm ~ 5mm, length 10 ~ 20mm;
The nano inorganic additive: 1% ~ 5%, this nano inorganic additive is a Nano particles of calcium carbonate, mean diameter is 20 ~ 50nm;
And the internal structure of said vibrating diaphragm is equally distributed cellular foam structure, and cell diameter is between 10 μ m ~ 100 μ m, and cell density is greater than 10
8Individual/cm
3
2. the method for manufacture of the speaker plate diaphragm that vegetable fibre reinforced polypropylene compound material as claimed in claim 1 is made is characterized in that comprising the following steps:
(1), according to formula rate acrylic resin, vegetable fibre and nano inorganic additive are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine;
(2), blank is put into special-purpose honeycomb hole foaming and forming apparatus, said device is heated to 120 ℃ ~ 160 ℃ and rotate the inner screw rod of said device, the plasticizing of blank melted by heating forms the matrix of said vibrating diaphragm; It is inner that high-pressure carbon dioxide gas is injected into said device; Said carbon dioxide gas pressure is 15 ~ 20MPa, forms polymkeric substance/gas homogeneous system with matrix, subsequently; Open pressure release valve removal carbon dioxide gas pressure; Thereby, after said device is cooled to 20 ℃ ~ 25 ℃, take out matrix at the equally distributed cellular abscess of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110195438 CN102295806B (en) | 2011-07-07 | 2011-07-07 | Speaker flat plate diaphragm made of vegetable fiber reinforced polypropylene composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110195438 CN102295806B (en) | 2011-07-07 | 2011-07-07 | Speaker flat plate diaphragm made of vegetable fiber reinforced polypropylene composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102295806A CN102295806A (en) | 2011-12-28 |
| CN102295806B true CN102295806B (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110195438 Expired - Fee Related CN102295806B (en) | 2011-07-07 | 2011-07-07 | Speaker flat plate diaphragm made of vegetable fiber reinforced polypropylene composite material |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103524871A (en) * | 2012-07-02 | 2014-01-22 | 合肥杰事杰新材料股份有限公司 | Fibrilia-reinforced polypropylene as well as preparation method thereof |
| CN104135708B (en) * | 2014-08-14 | 2017-08-25 | 陈宏乔 | The preparation method of jadeization giant clam nacre nano powder and the diaphragm of loudspeaker |
| CN104301849A (en) * | 2014-09-18 | 2015-01-21 | 宁波兴隆电子有限公司 | Solid guide microphone |
| CN105530574A (en) * | 2016-01-01 | 2016-04-27 | 苏州井利电子股份有限公司 | High-intensity cone for loudspeaker |
| CN105430578A (en) * | 2016-01-01 | 2016-03-23 | 苏州井利电子股份有限公司 | Paper cone for loudspeaker |
| CN105554642A (en) * | 2016-01-01 | 2016-05-04 | 苏州井利电子股份有限公司 | Long-life waterproof cone for loudspeaker |
| WO2018043224A1 (en) * | 2016-09-01 | 2018-03-08 | パナソニックＩｐマネジメント株式会社 | Speaker device and moving body device with same mounted thereon |
| CN107566946A (en) * | 2017-09-29 | 2018-01-09 | 德兴璞电子（深圳）有限公司 | A kind of full range articulatory configuration of sound equipment |
| JP7101929B2 (en) * | 2017-11-02 | 2022-07-19 | ヤマハ株式会社 | Diaphragm for speaker |
| CN114454569A (en) * | 2022-04-08 | 2022-05-10 | 保定惠东航空机械设备有限公司 | Recyclable environment-friendly honeycomb sandwich board |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877812A (en) * | 2009-04-30 | 2010-11-03 | 俞彬 | Manufacturing process of foaming vibration membrane for loudspeaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100744843B1 (en) * | 2005-10-14 | 2007-08-06 | (주)케이에이치 케미컬 | Acoustic Diaphragm And Speaker Having The Same |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877812A (en) * | 2009-04-30 | 2010-11-03 | 俞彬 | Manufacturing process of foaming vibration membrane for loudspeaker |
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| CN102295806A (en) | 2011-12-28 |
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Owner name: MA CHUNBIAO Free format text: FORMER OWNER: JILIN SHENYUN ELECTRONIC TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20120130 Owner name: GENG YUNYAO Effective date: 20120130 |
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Effective date of registration: 20120130 Address after: 136001 3128, economic development zone, Siping City, Jilin Province Applicant after: Ma Chunbiao Co-applicant after: Geng Yunyao Address before: 136001 3128, economic development zone, Siping City, Jilin Province Applicant before: Jilin Shenyun Electronic Technology Development Co., Ltd. |
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