CN111629317A - Redwood composite vibrating diaphragm and preparation method thereof - Google Patents
Redwood composite vibrating diaphragm and preparation method thereof Download PDFInfo
- Publication number
- CN111629317A CN111629317A CN202010374146.8A CN202010374146A CN111629317A CN 111629317 A CN111629317 A CN 111629317A CN 202010374146 A CN202010374146 A CN 202010374146A CN 111629317 A CN111629317 A CN 111629317A
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- rosewood
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- pulp
- drying
- pressure
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- 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
- H04R2307/021—Diaphragms comprising cellulose-like materials, e.g. wood, paper, linen
-
- 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 rosewood composite vibrating diaphragm and a preparation method thereof. The rosewood composite diaphragm comprises the following raw materials in parts by weight: 20-25 parts of cotton pulp, 15-20 parts of manila hemp, 10-15 parts of grass pulp, 5-10 parts of fiber and 50-60 parts of rosewood. The rosewood composite vibrating diaphragm provided by the invention is prepared from rosewood, manila hemp, cotton pulp, straw pulp and bulletproof fiber, and the raw materials are compounded to ensure that the rosewood composite vibrating diaphragm has good rigidity (higher than bending rate), small density, proper internal damping and high elasticity Young modulus, low frequency and high sound speed, and can retain unique natural sound so as to overcome the defects of the plastic vibrating diaphragm.
Description
Technical Field
The invention relates to the technical field of acoustic diaphragms, in particular to a rosewood composite diaphragm and a preparation method thereof.
Background
With the improvement of living standard of people, the requirements on a series of sound equipment such as earphones, speakers and the like are higher and higher, and especially the requirements on mobile phones and in-ear earplug speakers are higher and higher, and the development trend is to have better sound effect and smaller sound generating devices. The vibrating diaphragm is one of key components of a sounding element, and has a crucial influence on the tone quality of the loudspeaker. For most of the moving coil micro-speakers in the market at present, plastic diaphragms made of various high molecular compounds are basically adopted, such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyetherimide (PEI), Polyimide (PI), industrial Liquid Crystal Polymer (LCP), Polyetheretherketone (PEEK), Polycarbonate (PC), Polyether Plastics (PPS), polyarylate Plastics (PAR), and the like, and the common points of the diaphragms are extremely high plasticity, easy processing and low cost, but the diaphragms are small in internal resistance and poor in rigidity, so that distortion is large easily caused, and true original sound reduction is difficult.
Disclosure of Invention
The invention aims to provide a rosewood composite diaphragm and a preparation method thereof, and aims to solve the technical problems.
In order to achieve the purpose, the technical scheme of the invention is as follows:
in a first aspect, the invention provides a redwood composite diaphragm, which comprises the following raw materials in parts by weight:
20-25 parts of cotton pulp, 15-20 parts of manila hemp, 10-15 parts of grass pulp, 5-10 parts of fiber and 50-60 parts of rosewood.
Preferably, the fibers are ballistic resistant fibers.
Preferably, the straw pulp is spanish straw pulp.
In a second aspect, the present invention provides a method for preparing a rosewood composite diaphragm according to the first aspect, including the following steps:
(1) performing fiberization treatment on the rosewood to obtain rosewood fibers;
(2) mixing and pulping cotton pulp, manila hemp and straw pulp to obtain mixed pulp;
(3) adding water into the mixed slurry, uniformly mixing, adding the rosewood fiber, stirring for 3-10 min, adding the fiber, and stirring for 3-10 min;
(3) adding the stirred mixed material into a paper machine for dehydration treatment to obtain dehydrated paper;
(4) drying the dewatered paper, putting the dried paper into a mould, and heating and forming to prepare a paper basin;
(5) cutting the outer diameter of the formed cone according to the size requirement, spraying glue, drying, placing the cone into a pressure-vacuum forming die, placing the die into a copper ring, covering a flanging material, heating, pressure-vacuum forming, cooling, taking out, and cutting off the residual edge of the outer diameter to obtain the finished product.
Preferably, the weight ratio of the mixed slurry in the step (2) to the water is 1: 5-8.
Preferably, the drying method in the step (4) and the step (5) is any one selected from air drying, electric heating drying and forced air drying.
Preferably, the conditions for thermoforming in step (4) are as follows: the temperature is 160-170 ℃, the pressure is 5-6 KN, and the time is 2-5 min. Preferably, the conditions of the heating, pressing and air-drying molding in the step (5) are as follows: the temperature is 150-160 ℃, the pressure is 5-6 KN, and the time is 2-5 min.
Compared with the prior art, the invention has the beneficial effects that:
the rosewood composite vibrating diaphragm provided by the invention is prepared from rosewood, abaca, cotton pulp, straw pulp and bulletproof fiber, wherein the rosewood not only enables the vibrating diaphragm to have unique rosewood appearance, but also can play a role in increasing rigidity; the cotton pulp has good damping characteristic, can increase the surrounding sense of low frequency, improve the thickness of the voice and fill and level the middle frequency valley; the manila hemp is high-strength paper pulp, can effectively enhance the Young modulus of the cone, expand the high-frequency bandwidth of the cone and improve the sensitivity; spanish grass pulp can effectively improve the softness of human voice; the ballistic fiber is a high young's modulus fiber; the raw materials are compounded, so that the rosewood composite vibrating diaphragm has good rigidity (higher than bending rate), small density, proper internal damping and high Young modulus of elasticity, low frequency and high sound speed, and can keep unique natural sound to overcome the defects of the plastic vibrating diaphragm.
Detailed Description
The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
Weighing the following raw materials in parts by weight: 22 parts of American cotton pulp, 18 parts of manila hemp, 12 parts of Spanish grass pulp, 8 parts of bulletproof fiber and 55 parts of rosewood, and then preparing a finished product according to the following preparation method:
(1) performing fiberization treatment on the rosewood to obtain rosewood fibers;
(2) mixing American cotton pulp, manila hemp and Spanish grass pulp, and pulping to obtain mixed pulp;
(3) adding water into the mixed slurry according to the weight ratio of the mixed slurry to the water of 1:6, uniformly mixing, adding the redwood fiber, stirring for 5min, adding the bulletproof fiber, and stirring for 5 min;
(3) adding the stirred mixed material into a paper machine for dehydration treatment to obtain dehydrated paper;
(4) put into the mould behind the paper that will dewater after drying thermoforming, make the cone, wherein, thermoforming's condition is: the temperature is 165 ℃, the pressure is 5KN, and the time is 3 min.
(5) Cutting the outer diameter of the formed paper basin according to the size requirement, spraying glue, drying, putting the paper basin into a pressure-vacuum forming die, putting the die into a copper ring, covering a flanging material, heating, pressure-vacuum forming, cooling, taking out, cutting off the outer diameter residual edge, and obtaining a finished product, wherein the conditions of the heating, pressure-vacuum forming are as follows: the temperature is 165 ℃, the pressure is 5KN, and the time is 3 min.
Example 2
Weighing the following raw materials in parts by weight: 20 parts of American cotton pulp, 15 parts of manila hemp, 10 parts of Spanish grass pulp, 5 parts of bulletproof fiber and 50 parts of rosewood, and then preparing a finished product according to the following preparation method:
(1) performing fiberization treatment on the rosewood to obtain rosewood fibers;
(2) mixing American cotton pulp, manila hemp and Spanish grass pulp, and pulping to obtain mixed pulp;
(3) adding water into the mixed slurry according to the weight ratio of the mixed slurry to the water of 1:6, uniformly mixing, adding redwood fibers, stirring for 10min, adding bulletproof fibers, and stirring for 10 min;
(3) adding the stirred mixed material into a paper machine for dehydration treatment to obtain dehydrated paper;
(4) put into the mould behind the paper that will dewater after drying thermoforming, make the cone, wherein, thermoforming's condition is: the temperature is 160 ℃, the pressure is 6KN, and the time is 4 min.
(5) Cutting the outer diameter of the formed paper basin according to the size requirement, spraying glue, drying, putting the paper basin into a pressure-vacuum forming die, putting the die into a copper ring, covering a flanging material, heating, pressure-vacuum forming, cooling, taking out, cutting off the outer diameter residual edge, and obtaining a finished product, wherein the conditions of the heating, pressure-vacuum forming are as follows: the temperature is 160 ℃, the pressure is 6KN, and the time is 4 min.
Example 3
Weighing the following raw materials in parts by weight: 25 parts of American cotton pulp, 20 parts of manila hemp, 15 parts of Spanish grass pulp, 10 parts of bulletproof fiber and 60 parts of rosewood, and then preparing a finished product according to the following preparation method:
(1) performing fiberization treatment on the rosewood to obtain rosewood fibers;
(2) mixing American cotton pulp, manila hemp and Spanish grass pulp, and pulping to obtain mixed pulp;
(3) adding water into the mixed slurry according to the weight ratio of the mixed slurry to the water of 1:6, uniformly mixing, adding redwood fibers, stirring for 3min, adding bulletproof fibers, and stirring for 3 min;
(3) adding the stirred mixed material into a paper machine for dehydration treatment to obtain dehydrated paper;
(4) put into the mould behind the paper that will dewater after drying thermoforming, make the cone, wherein, thermoforming's condition is: the temperature is 170 deg.C, the pressure is 5KN, and the time is 5 min.
(5) Cutting the outer diameter of the formed paper basin according to the size requirement, spraying glue, drying, putting the paper basin into a pressure-vacuum forming die, putting the die into a copper ring, covering a flanging material, heating, pressure-vacuum forming, cooling, taking out, cutting off the outer diameter residual edge, and obtaining a finished product, wherein the conditions of the heating, pressure-vacuum forming are as follows: the temperature is 170 deg.C, the pressure is 5KN, and the time is 5 min.
Example 4
Weighing the following raw materials in parts by weight: 24 parts of American cotton pulp, 16 parts of manila hemp, 14 parts of Spanish grass pulp, 6 parts of bulletproof fiber and 50 parts of rosewood, and then preparing a finished product according to the following preparation method:
(1) performing fiberization treatment on the rosewood to obtain rosewood fibers;
(2) mixing American cotton pulp, manila hemp and Spanish grass pulp, and pulping to obtain mixed pulp;
(3) adding water into the mixed slurry according to the weight ratio of the mixed slurry to the water of 1:6, uniformly mixing, adding redwood fibers, stirring for 7min, adding bulletproof fibers, and stirring for 7 min;
(3) adding the stirred mixed material into a paper machine for dehydration treatment to obtain dehydrated paper;
(4) put into the mould behind the paper that will dewater after drying thermoforming, make the cone, wherein, thermoforming's condition is: the temperature is 165 ℃, the pressure is 5KN, and the time is 3 min.
(5) Cutting the outer diameter of the formed paper basin according to the size requirement, spraying glue, drying, putting the paper basin into a pressure-vacuum forming die, putting the die into a copper ring, covering a flanging material, heating, pressure-vacuum forming, cooling, taking out, cutting off the outer diameter residual edge, and obtaining a finished product, wherein the conditions of the heating, pressure-vacuum forming are as follows: the temperature is 165 ℃, the pressure is 5KN, and the time is 3 min.
Example 5
Weighing the following raw materials in parts by weight: 23 parts of American cotton pulp, 16 parts of manila hemp, 14 parts of Spanish grass pulp, 7 parts of bulletproof fiber and 55 parts of rosewood, and then preparing a finished product according to the following preparation method:
(1) performing fiberization treatment on the rosewood to obtain rosewood fibers;
(2) mixing American cotton pulp, manila hemp and Spanish grass pulp, and pulping to obtain mixed pulp;
(3) adding water into the mixed slurry according to the weight ratio of the mixed slurry to the water of 1:5, uniformly mixing, adding redwood fibers, stirring for 8min, adding bulletproof fibers, and stirring for 8 min;
(3) adding the stirred mixed material into a paper machine for dehydration treatment to obtain dehydrated paper;
(4) put into the mould behind the paper that will dewater after drying thermoforming, make the cone, wherein, thermoforming's condition is: the temperature is 165 ℃, the pressure is 5KN, and the time is 3 min.
(5) Cutting the outer diameter of the formed paper basin according to the size requirement, spraying glue, drying, putting the paper basin into a pressure-vacuum forming die, putting the die into a copper ring, covering a flanging material, heating, pressure-vacuum forming, cooling, taking out, cutting off the outer diameter residual edge, and obtaining a finished product, wherein the conditions of the heating, pressure-vacuum forming are as follows: the temperature is 165 ℃, the pressure is 5KN, and the time is 3 min.
Example 6
Weighing the following raw materials in parts by weight: 21 parts of American cotton pulp, 17 parts of manila hemp, 13 parts of Spanish grass pulp, 6 parts of bulletproof fiber and 53 parts of rosewood, and then preparing a finished product according to the following preparation method:
(1) performing fiberization treatment on the rosewood to obtain rosewood fibers;
(2) mixing American cotton pulp, manila hemp and Spanish grass pulp, and pulping to obtain mixed pulp;
(3) adding water into the mixed slurry according to the weight ratio of the mixed slurry to the water of 1:8, uniformly mixing, adding the redwood fiber, stirring for 5min, adding the bulletproof fiber, and stirring for 5 min;
(3) adding the stirred mixed material into a paper machine for dehydration treatment to obtain dehydrated paper;
(4) put into the mould behind the paper that will dewater after drying thermoforming, make the cone, wherein, thermoforming's condition is: the temperature is 165 ℃, the pressure is 5KN, and the time is 3 min.
(5) Cutting the outer diameter of the formed paper basin according to the size requirement, spraying glue, drying, putting the paper basin into a pressure-vacuum forming die, putting the die into a copper ring, covering a flanging material, heating, pressure-vacuum forming, cooling, taking out, cutting off the outer diameter residual edge, and obtaining a finished product, wherein the conditions of the heating, pressure-vacuum forming are as follows: the temperature is 165 ℃, the pressure is 5KN, and the time is 3 min.
The performance of the product obtained above was tested, and the test results are shown in the following table:
the test results in the table show that the rosewood composite diaphragm provided by the embodiment of the invention has good rigidity and damping characteristics, the measured distortion rates are less than 3%, the represented tone quality is good, the noise is less, and the unique natural sound can be reserved.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (8)
1. The rosewood composite diaphragm is characterized by comprising the following raw materials in parts by weight:
20-25 parts of cotton pulp, 15-20 parts of manila hemp, 10-15 parts of grass pulp, 5-10 parts of fiber and 50-60 parts of rosewood.
2. The rosewood composite diaphragm of claim 1, wherein the fibers are ballistic resistant fibers.
3. The rosewood composite diaphragm of claim 1, wherein the straw pulp is spanish straw pulp.
4. The preparation method of the rosewood composite diaphragm of any one of claims 1 to 3, characterized by comprising the following steps:
(1) performing fiberization treatment on the rosewood to obtain rosewood fibers;
(2) mixing and pulping cotton pulp, manila hemp and straw pulp to obtain mixed pulp;
(3) adding water into the mixed slurry, uniformly mixing, adding the rosewood fiber, stirring for 3-10 min, adding the fiber, and stirring for 3-10 min;
(3) adding the stirred mixed material into a paper machine for dehydration treatment to obtain dehydrated paper;
(4) drying the dewatered paper, putting the dried paper into a mould, and heating and forming to prepare a paper basin;
(5) cutting the outer diameter of the formed cone according to the size requirement, spraying glue, drying, placing the cone into a pressure-vacuum forming die, placing the die into a copper ring, covering a flanging material, heating, pressure-vacuum forming, cooling, taking out, and cutting off the residual edge of the outer diameter to obtain the finished product.
5. The preparation method of the rosewood composite diaphragm according to claim 4, wherein the weight ratio of the mixed slurry in the step (2) to the water is 1: 5-8.
6. The method for preparing the rosewood composite diaphragm according to claim 4, wherein the drying method in the step (4) and the step (5) is any one selected from air drying, electric heating drying and air blowing drying.
7. The method for preparing the rosewood composite diaphragm according to claim 4, wherein the conditions of the heating and forming in the step (4) are as follows: the temperature is 150-160 ℃, the pressure is 5-6 KN, and the time is 2-5 min.
8. The method for preparing the rosewood composite diaphragm according to claim 4, wherein the conditions of the heating, pressing and air-forming in the step (5) are as follows: the temperature is 150-160 ℃, the pressure is 5-6 KN, and the time is 2-5 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010374146.8A CN111629317A (en) | 2020-05-06 | 2020-05-06 | Redwood composite vibrating diaphragm and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010374146.8A CN111629317A (en) | 2020-05-06 | 2020-05-06 | Redwood composite vibrating diaphragm and preparation method thereof |
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| CN111629317A true CN111629317A (en) | 2020-09-04 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6641463B1 (en) * | 1999-02-06 | 2003-11-04 | Beaver Creek Concepts Inc | Finishing components and elements |
| CN1512821A (en) * | 2002-12-29 | 2004-07-14 | 葛南尧 | Non pulp base material speaker sound cone and its producing process |
| CN101626539A (en) * | 2009-08-04 | 2010-01-13 | 天津科技大学 | Manufacture method of high performance paper loudspeaker diaphragm materials |
| CN101720053A (en) * | 2009-11-13 | 2010-06-02 | 国光电器股份有限公司 | Speaker vibration film made of non-wood fibers and manufacture process thereof |
| CN106930148A (en) * | 2017-01-20 | 2017-07-07 | 广西玉林市禹力音响配件有限公司 | A kind of paper pulp |
| CN106948211A (en) * | 2017-01-20 | 2017-07-14 | 广西玉林市禹力音响配件有限公司 | A kind of water proof fire retardant cone |
-
2020
- 2020-05-06 CN CN202010374146.8A patent/CN111629317A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6641463B1 (en) * | 1999-02-06 | 2003-11-04 | Beaver Creek Concepts Inc | Finishing components and elements |
| CN1512821A (en) * | 2002-12-29 | 2004-07-14 | 葛南尧 | Non pulp base material speaker sound cone and its producing process |
| CN101626539A (en) * | 2009-08-04 | 2010-01-13 | 天津科技大学 | Manufacture method of high performance paper loudspeaker diaphragm materials |
| CN101720053A (en) * | 2009-11-13 | 2010-06-02 | 国光电器股份有限公司 | Speaker vibration film made of non-wood fibers and manufacture process thereof |
| CN106930148A (en) * | 2017-01-20 | 2017-07-07 | 广西玉林市禹力音响配件有限公司 | A kind of paper pulp |
| CN106948211A (en) * | 2017-01-20 | 2017-07-14 | 广西玉林市禹力音响配件有限公司 | A kind of water proof fire retardant cone |
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Application publication date: 20200904 |
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