CN102295805B - Loudspeaker diaphragm made from polypropylene blend - Google Patents
Loudspeaker diaphragm made from polypropylene blend Download PDFInfo
- Publication number
- CN102295805B CN102295805B CN201110189771A CN201110189771A CN102295805B CN 102295805 B CN102295805 B CN 102295805B CN 201110189771 A CN201110189771 A CN 201110189771A CN 201110189771 A CN201110189771 A CN 201110189771A CN 102295805 B CN102295805 B CN 102295805B
- Authority
- CN
- China
- Prior art keywords
- matrix
- diaphragm
- blank
- carbon dioxide
- loudspeaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 24
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 22
- -1 polypropylene Polymers 0.000 title claims abstract description 17
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 13
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 48
- 239000011159 matrix material Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 27
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 24
- 239000001569 carbon dioxide Substances 0.000 claims description 24
- 239000004925 Acrylic resin Substances 0.000 claims description 11
- 229920000178 Acrylic resin Polymers 0.000 claims description 11
- 239000007858 starting material Substances 0.000 claims description 9
- 238000005187 foaming Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000003698 laser cutting Methods 0.000 claims description 8
- 239000005543 nano-size silicon particle Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 6
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002829 reductive effect Effects 0.000 abstract description 2
- 239000011343 solid material Substances 0.000 abstract description 2
- 238000010923 batch production Methods 0.000 abstract 1
- 229920003244 diene elastomer Polymers 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 229920002522 Wood fibre Polymers 0.000 description 2
- VMQPMGHYRISRHO-UHFFFAOYSA-N benzvalene Chemical group C1=CC2C3C1C32 VMQPMGHYRISRHO-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention relates to a loudspeaker diaphragm made from polypropylene blend, and belongs to the field of electroacoustic device and audio product manufacturing. The loudspeaker diaphragm provided by the invention comprises the following raw materials of: by weight, 68%-75% of a polypropylene resin; 18%-25% of a high-density polyethylene resin with the density being 0.94-0.96g/cm<3>; 6%-9% of powdered steatile or an ethene-propylene-diene rubber; and 1%-3% of nanometer silica particles with the diameter being 25-40nm. The beneficial effects are as follows: the supply of the adopted raw materials is sufficient; the cost is low; the density is greatly reduced in comparison with that of solid materials with the same dimension; the rigidity is markedly raised; the loudspeaker diaphragm provided by the invention is applicable to large batch production and performance parameter control.
Description
Technical field
The invention belongs to electro-acoustic element and acoustic product and make the field, be specifically related to a kind of diaphragm of loudspeaker, especially a kind ofly adopt that the polypropylene blend manufacturing thickness is ultra-thin, the diaphragm of loudspeaker 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 diaphragm of loudspeaker that the present invention provides a kind of polypropylene blend to make
,To solve the audio variation of speaker, the problem that distortion increases.Adopt that the polypropylene blend manufacturing thickness is ultra-thin, light weight, Hz-KHz is wide, inside has the honeycomb cavernous structure the diaphragm of loudspeaker.
The technical scheme that the present invention adopts is: the raw material by following mass percent is formed:
Acrylic resin: 68% ~ 75%;
High-density polyethylene resin, density are 0.94 ~ 0.96g/cm
3: 18% ~ 25%;
Talcum powder or ethylene-propylene-dience rubber: 6% ~ 9%;
Nano-silicon dioxide particle, diameter are 25 ~ 40nm, 1% ~ 3%.
The method of manufacture of the diaphragm of loudspeaker that polypropylene blend of the present invention is made comprises the following steps:
(1), according to formula rate starting material are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine,
(2), blank is put into the 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 honeycomb hole of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size at last.
The internal structure of said vibrating diaphragm is the honeycomb cavernous structure, and the honeycomb hole diameter is between 10 μ m ~ 100 μ m, and honeycomb cell densities range is greater than 10
8Individual/cm
3
A kind of diaphragm of loudspeaker that adopts polypropylene blend to make is made the raw material of said vibrating diaphragm and is made up of acrylic resin (the English PP of abbreviation), high-density polyethylene resin (the English HDPE of abbreviation), modified additive.
Acrylic resin 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; Its raw material supply is sufficient, with low cost, is a kind of comparatively ideal diaphragm of loudspeaker starting material.The diaphragm of loudspeaker inherent damping that adopts the PP resin to make is good, does not receive the influence of ambient moisture, processes and be controlled to the molded dimension error easily.The internal structure of said vibrating diaphragm is the honeycomb cavernous structure, and the honeycomb hole diameter is between 10 μ m ~ 100 μ m, and honeycomb cell densities range is greater than 10
8Individual/cm
3, have that quality alleviates significantly, good rigidity, than advantages such as spring rate significantly improve.But because the PP resin is linear, crystalline polymer, during molten state, the intensity of melt is low; In order to guarantee to obtain equally distributed honeycomb porous 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 raw material supply of being adopted is sufficient, with low cost, does not destroy the forest reserves;
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 10% ~ 15%;
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
Acrylic resin (the English PP of abbreviation), high-density polyethylene resin (the English HDPE of abbreviation), ethylene-propylene-dience rubber (the English EPDM that is called for short)
Embodiment 1
Form by the raw material of following mass percent:
Acrylic resin: 68%;
High-density polyethylene resin, density are 0.94g/cm
3: 20%;
Talcum powder: 9%;
Nano-silicon dioxide particle, diameter are 25nm, 3%.
The method of manufacture of the diaphragm of loudspeaker that polypropylene blend of the present invention is made comprises the following steps:
(1), according to formula rate starting material are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine,
(2), blank is put into the 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 honeycomb hole of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size at last.
The internal structure of said vibrating diaphragm is the honeycomb cavernous structure, and the honeycomb hole diameter is between 10 μ m ~ 100 μ m, and honeycomb cell densities range is greater than 10
8Individual/cm
3
Embodiment 2
Form by the raw material of following mass percent:
Acrylic resin: 71.5%;
High-density polyethylene resin, density are 0.95g/cm
3: 21.5%;
Talcum powder: 5.0%;
Nano-silicon dioxide particle, diameter are 35nm, 2%.
The method of manufacture of the diaphragm of loudspeaker that polypropylene blend of the present invention is made comprises the following steps:
(1), according to formula rate starting material are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine,
(2), blank is put into the 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 17Mpa, 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 ℃, take out matrix at the equally distributed honeycomb hole of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size at last.
Embodiment 3
Form by the raw material of following mass percent:
Acrylic resin: 75%;
High-density polyethylene resin, density are 0.96g/cm
3: 18%;
Talcum powder: 6%;
Nano-silicon dioxide particle, diameter are 40nm, 1%.
The method of manufacture of the diaphragm of loudspeaker that polypropylene blend of the present invention is made comprises the following steps:
(1), according to formula rate starting material are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine,
(2), blank is put into the 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 honeycomb hole of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size at last.
Embodiment 4
Form by the raw material of following mass percent:
Acrylic resin: 68%;
High-density polyethylene resin, density are 0.94g/cm
3: 25%;
Ethylene-propylene-dience rubber: 6%;
Nano-silicon dioxide particle, diameter are 25nm, 1%.
The method of manufacture of the diaphragm of loudspeaker that polypropylene blend of the present invention is made comprises the following steps:
(1), according to formula rate starting material are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine,
(2), blank is put into the 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 18Mpa, 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 23 ℃, take out matrix at the equally distributed honeycomb hole of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size at last.
Embodiment 5
Form by the raw material of following mass percent:
Acrylic resin: 69%;
High-density polyethylene resin, density are 0.95g/cm
3: 21.5%;
Ethylene-propylene-dience rubber: 7.5%;
Nano-silicon dioxide particle, diameter are 32nm, 2%.
The method of manufacture of the diaphragm of loudspeaker that polypropylene blend of the present invention is made comprises the following steps:
(1), according to formula rate starting material are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine,
(2), blank is put into the 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 honeycomb hole of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size at last.
Embodiment 6
Form by the raw material of following mass percent:
Acrylic resin: 75%;
High-density polyethylene resin, density are 0.96g/cm
3: 18%;
Ethylene-propylene-dience rubber: 6%;
Nano-silicon dioxide particle, diameter are 40nm, 1%.
The method of manufacture of the diaphragm of loudspeaker that polypropylene blend of the present invention is made comprises the following steps:
(1), according to formula rate starting material are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine,
(2), blank is put into the 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 honeycomb hole of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size at last.
Claims (2)
1. the diaphragm of loudspeaker made of a polypropylene blend is characterized in that being made up of the raw material of following mass percent:
Acrylic resin: 68% ~ 75%;
High-density polyethylene resin, density are 0.94 ~ 0.96g/cm
3: 18% ~ 25%;
Talcum powder or ethylene-propylene-dience rubber: 6% ~ 9%;
Nano-silicon dioxide particle, diameter are 25 ~ 40nm, 1% ~ 3%;
Internal structure is the honeycomb cavernous structure, and the honeycomb hole diameter is between 10 μ m ~ 100 μ m, and honeycomb cell densities range is greater than 10
8Individual/cm
3
2. the method for manufacture of the diaphragm of loudspeaker that polypropylene blend as claimed in claim 1 is made comprises the following steps:
(1), according to formula rate starting material are sent into mixing roll and mix, be pressed into the blank of desired shape through press-forming machine,
(2), blank is put into the 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 honeycomb hole of the inner acquisition of matrix;
(3), utilize laser cutting or blanking method to process the vibrating diaphragm of desired shape and size at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110189771A CN102295805B (en) | 2011-07-07 | 2011-07-07 | Loudspeaker diaphragm made from polypropylene blend |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110189771A CN102295805B (en) | 2011-07-07 | 2011-07-07 | Loudspeaker diaphragm made from polypropylene blend |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102295805A CN102295805A (en) | 2011-12-28 |
| CN102295805B true CN102295805B (en) | 2012-10-10 |
Family
ID=45356493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110189771A Expired - Fee Related CN102295805B (en) | 2011-07-07 | 2011-07-07 | Loudspeaker diaphragm made from polypropylene blend |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102295805B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929710A (en) * | 2014-04-25 | 2014-07-16 | 瑞声光电科技(常州)有限公司 | Preparation method of composite vibrating diaphragm |
| CN104125530A (en) * | 2014-06-20 | 2014-10-29 | 宁波兴隆电子有限公司 | High-signal to noise ratio curve double-down microphone |
| CN107484099A (en) * | 2017-08-16 | 2017-12-15 | 东莞涌韵音膜有限公司 | The production method that air-permeable material and sound film is made using the material of earphone sound film |
| CN107454546A (en) * | 2017-08-16 | 2017-12-08 | 东莞涌韵音膜有限公司 | Speaker film production process |
| CN107501590B (en) * | 2017-09-14 | 2021-01-08 | 泰兴扬声电子有限公司 | Method for preparing loudspeaker diaphragm by irradiation modification |
| CN111787466B (en) * | 2020-07-08 | 2023-01-24 | 深圳市时商创展科技有限公司 | A kind of sound diaphragm and sound |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986627A (en) * | 2005-12-22 | 2007-06-27 | 吴永刚 | Composite polypropylene material and its preparing method |
| CN101288336A (en) * | 2005-10-14 | 2008-10-15 | Kh化学有限公司 | Acoustic diaphragm and speaker including same |
| CN101304622A (en) * | 2007-05-09 | 2008-11-12 | 富准精密工业(深圳)有限公司 | Audio film structure of electroacoustic apparatus and preparation method thereof |
| CN101552943A (en) * | 2009-05-18 | 2009-10-07 | 毛丛敏 | A sheet material for producing loudspeaker cone and its processing technique |
-
2011
- 2011-07-07 CN CN201110189771A patent/CN102295805B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101288336A (en) * | 2005-10-14 | 2008-10-15 | Kh化学有限公司 | Acoustic diaphragm and speaker including same |
| CN1986627A (en) * | 2005-12-22 | 2007-06-27 | 吴永刚 | Composite polypropylene material and its preparing method |
| CN101304622A (en) * | 2007-05-09 | 2008-11-12 | 富准精密工业(深圳)有限公司 | Audio film structure of electroacoustic apparatus and preparation method thereof |
| CN101552943A (en) * | 2009-05-18 | 2009-10-07 | 毛丛敏 | A sheet material for producing loudspeaker cone and its processing technique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102295805A (en) | 2011-12-28 |
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Owner name: GENG YUNYAO Effective date: 20120130 Owner name: MA CHUNBIAO Free format text: FORMER OWNER: JILIN SHENYUN ELECTRONIC TECHNOLOGY DEVELOPMENT CO., LTD. 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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