CN102295805A - Loudspeaker diaphragm made from polypropylene blend - Google Patents
Loudspeaker diaphragm made from polypropylene blend Download PDFInfo
- Publication number
- CN102295805A CN102295805A CN 201110189771 CN201110189771A CN102295805A CN 102295805 A CN102295805 A CN 102295805A CN 201110189771 CN201110189771 CN 201110189771 CN 201110189771 A CN201110189771 A CN 201110189771A CN 102295805 A CN102295805 A CN 102295805A
- Authority
- CN
- China
- Prior art keywords
- diaphragm
- matrix
- described device
- loudspeaker
- blank
- 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.)
- Granted
Links
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 of thickness that adopts polypropylene blend to make 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 loud speaker.After the size shape of vibrating diaphragm was determined, material that vibrating diaphragm is selected and moulding process just had very important influence to the performance and the tonequality of loud speaker.At present, the material of the diaphragm of loudspeaker is mainly used wood fibre or is the main cone made from the 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 loud speaker adopts awl benzvalene form vibrating diaphragm, and the occupation of land space is big, is difficult to satisfy consumption electronic product, as " 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 loud speaker integral thickness, the bass effect of loud speaker and tonequality reductive are cashed variation thereupon.
Guarantee excellent tonequality simultaneously in order to satisfy the loud speaker slimming, need the loudspeaker diaphragm materials of development of new.
Summary of the invention
The invention provides the diaphragm of loudspeaker that a kind of polypropylene blend is made
,To solve the audio variation of loud speaker, the problem that distortion increases.The thickness that adopts polypropylene blend to make is ultra-thin, light weight, Hz-KHz is wide, inside has the honeycomb cavernous structure the diaphragm of loudspeaker.
The technical solution used in the present invention is: be 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%.
The manufacture method 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, described device is heated to 120 ℃ ~ 160 ℃ and rotate the inner screw rod of described device, the plasticizing of blank melted by heating forms the matrix of described vibrating diaphragm, it is inner that high-pressure carbon dioxide gas is injected into described device, described carbon dioxide gas pressure is 15 ~ 20Mpa, form polymkeric substance/gas homogeneous system with matrix, subsequently, open pressure release valve removal carbon dioxide gas pressure, thereby at the equally distributed honeycomb hole of the inner acquisition of matrix, after described device is cooled to 20 ℃ ~ 25 ℃, take out matrix;
(3), utilize laser cutting or blanking method to make the vibrating diaphragm of desired shape and size at last.
The internal structure of described 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 described 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 abundance, 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, is not subjected to the influence of ambient moisture, processes and be controlled to the molded dimension error easily.The internal structure of described 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 abundance that is adopted, with low cost is not destroyed the forest reserves;
2, the inside of described 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 of the present invention with the conventional paper cone material
0Reduced by 10% ~ 15%;
3, described vibrating diaphragm can adopt injection moulding, plastics molding process processing such as extrude, and is easy to produce in enormous quantities and performance perameter is controlled.
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 manufacture method 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, described device is heated to 120 ℃ and rotate the inner screw rod of described device, the plasticizing of blank melted by heating forms the matrix of described vibrating diaphragm, it is inner that high-pressure carbon dioxide gas is injected into described device, described carbon dioxide gas pressure is 15Mpa, form polymkeric substance/gas homogeneous system with matrix, subsequently, open pressure release valve removal carbon dioxide gas pressure, thereby at the equally distributed honeycomb hole of the inner acquisition of matrix, after described device is cooled to 20 ℃, take out matrix;
(3), utilize laser cutting or blanking method to make the vibrating diaphragm of desired shape and size at last.
The internal structure of described 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 manufacture method 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, described device is heated to 140 ℃ and rotate the inner screw rod of described device, the plasticizing of blank melted by heating forms the matrix of described vibrating diaphragm, it is inner that high-pressure carbon dioxide gas is injected into described device, described carbon dioxide gas pressure is 17Mpa, form polymkeric substance/gas homogeneous system with matrix, subsequently, open pressure release valve removal carbon dioxide gas pressure, thereby at the equally distributed honeycomb hole of the inner acquisition of matrix, after described device is cooled to 22 ℃, take out matrix;
(3), utilize laser cutting or blanking method to make 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 manufacture method 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, described device is heated to 160 ℃ and rotate the inner screw rod of described device, the plasticizing of blank melted by heating forms the matrix of described vibrating diaphragm, it is inner that high-pressure carbon dioxide gas is injected into described device, described carbon dioxide gas pressure is 20Mpa, form polymkeric substance/gas homogeneous system with matrix, subsequently, open pressure release valve removal carbon dioxide gas pressure, thereby at the equally distributed honeycomb hole of the inner acquisition of matrix, after described device is cooled to 25 ℃, take out matrix;
(3), utilize laser cutting or blanking method to make 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 manufacture method 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, described device is heated to 120 ℃ and rotate the inner screw rod of described device, the plasticizing of blank melted by heating forms the matrix of described vibrating diaphragm, it is inner that high-pressure carbon dioxide gas is injected into described device, described carbon dioxide gas pressure is 18Mpa, form polymkeric substance/gas homogeneous system with matrix, subsequently, open pressure release valve removal carbon dioxide gas pressure, thereby at the equally distributed honeycomb hole of the inner acquisition of matrix, after described device is cooled to 23 ℃, take out matrix;
(3), utilize laser cutting or blanking method to make 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 manufacture method 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, described device is heated to 140 ℃ and rotate the inner screw rod of described device, the plasticizing of blank melted by heating forms the matrix of described vibrating diaphragm, it is inner that high-pressure carbon dioxide gas is injected into described device, described carbon dioxide gas pressure is 17.5Mpa, form polymkeric substance/gas homogeneous system with matrix, subsequently, open pressure release valve removal carbon dioxide gas pressure, thereby at the equally distributed honeycomb hole of the inner acquisition of matrix, after described device is cooled to 22.5 ℃, take out matrix;
(3), utilize laser cutting or blanking method to make 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 manufacture method 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, described device is heated to 160 ℃ and rotate the inner screw rod of described device, the plasticizing of blank melted by heating forms the matrix of described vibrating diaphragm, it is inner that high-pressure carbon dioxide gas is injected into described device, described carbon dioxide gas pressure is 20Mpa, form polymkeric substance/gas homogeneous system with matrix, subsequently, open pressure release valve removal carbon dioxide gas pressure, thereby at the equally distributed honeycomb hole of the inner acquisition of matrix, after described device is cooled to 25 ℃, take out matrix;
(3), utilize laser cutting or blanking method to make the vibrating diaphragm of desired shape and size at last.
Claims (3)
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%.
2. the diaphragm of loudspeaker that polypropylene blend according to claim 1 is made, it is characterized in that: 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
3. the manufacture method 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, described device is heated to 120 ℃ ~ 160 ℃ and rotate the inner screw rod of described device, the plasticizing of blank melted by heating forms the matrix of described vibrating diaphragm, it is inner that high-pressure carbon dioxide gas is injected into described device, described carbon dioxide gas pressure is 15 ~ 20Mpa, form polymkeric substance/gas homogeneous system with matrix, subsequently, open pressure release valve removal carbon dioxide gas pressure, thereby at the equally distributed honeycomb hole of the inner acquisition of matrix, after described device is cooled to 20 ℃ ~ 25 ℃, take out matrix;
(3), utilize laser cutting or blanking method to make 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 true CN102295805A (en) | 2011-12-28 |
| CN102295805B 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) |
Cited By (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 |
| CN107454546A (en) * | 2017-08-16 | 2017-12-08 | 东莞涌韵音膜有限公司 | Speaker film production process |
| 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 |
| CN107501590A (en) * | 2017-09-14 | 2017-12-22 | 黄建伟 | The method that the diaphragm of loudspeaker is prepared using radiation modification |
| CN111787466A (en) * | 2020-07-08 | 2020-10-16 | 深圳市时商创展科技有限公司 | Sound box vibrating diaphragm and sound box |
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 speakers having the 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 speakers having the 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 |
Cited By (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 |
| CN107454546A (en) * | 2017-08-16 | 2017-12-08 | 东莞涌韵音膜有限公司 | Speaker film production process |
| 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 |
| CN107501590A (en) * | 2017-09-14 | 2017-12-22 | 黄建伟 | The method that the diaphragm of loudspeaker is prepared using radiation modification |
| CN111787466A (en) * | 2020-07-08 | 2020-10-16 | 深圳市时商创展科技有限公司 | Sound box vibrating diaphragm and sound box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102295805B (en) | 2012-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102295806B (en) | Speaker flat plate diaphragm made of vegetable fiber reinforced polypropylene composite material | |
| CN102295805B (en) | Loudspeaker diaphragm made from polypropylene blend | |
| CN102344640B (en) | Loudspeaker diaphragm made from ABS (acrylonitrile-butadiene-styrene) copolymer nanocomposite | |
| CN102321297B (en) | Loudspeaker diaphragm manufactured from fiber-reinforced resin based composite nanomaterial | |
| CN106957466B (en) | Vibrating diaphragm and preparation method thereof for electroacoustics system | |
| JP2009506149A5 (en) | ||
| CN101631266B (en) | Speaker cones material and preparation method thereof | |
| CN103087361A (en) | Blown rubber for thick product and variable temperature mould pressing preparation method thereof | |
| CN107619496B (en) | Foamed polymer composite material with bimodal closed-cell structure and preparation method thereof | |
| CN107793637B (en) | Polypropylene modified sound insulation composite material and preparation method thereof | |
| CN102964670B (en) | Production method of damping sound absorption material containing kapok fiber | |
| CN107880347A (en) | A kind of EPE pearl wool and preparation method thereof | |
| CN108285578B (en) | Preparation method of PP/ABS micro-foaming material | |
| WO2009090857A1 (en) | Diaphragm for speaker, speaker using the diaphragm, electronic device using the speaker, and speaker-mounted device | |
| CN102333269B (en) | Loudspeaker diaphragm made of low density polyethylene nano-composite | |
| CN101597407B (en) | Method for preparing blends of waste rubber powder and thermoplastic vulcanizate | |
| CN111748122B (en) | Expandable biodegradable particles and high-foaming-rate biodegradable expanded beads with antistatic function | |
| CN103382260A (en) | Production method of polyether ketone and modified nano silicon dioxide foaming materials and by supercritical carbon dioxide | |
| CN101552943B (en) | A sheet material for producing loudspeaker cone and its processing technique | |
| CN105291340A (en) | Water foaming injection method by using super absorbent resin as carrier | |
| CN202610154U (en) | Whisker reinforced artificial stone plate | |
| CN103209372A (en) | Collapse-free sound film | |
| CN101778324A (en) | Loudspeaker vibration sound film | |
| CN203813949U (en) | Ultra-wideband composite diaphragm without adhesive layer | |
| JP2007096498A (en) | Diaphragm for speaker and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
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 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
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. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20160707 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |