CN110248305A - Tuning cotton and its manufacture craft - Google Patents
Tuning cotton and its manufacture craft Download PDFInfo
- Publication number
- CN110248305A CN110248305A CN201910507670.5A CN201910507670A CN110248305A CN 110248305 A CN110248305 A CN 110248305A CN 201910507670 A CN201910507670 A CN 201910507670A CN 110248305 A CN110248305 A CN 110248305A
- Authority
- CN
- China
- Prior art keywords
- hot pressing
- tuning
- thickness
- sheet material
- cotton
- 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.)
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Classifications
-
- 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
- H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
- H04R2231/001—Moulding aspects of diaphragm or surround
Abstract
The invention discloses tuning cotton and its manufacture crafts, belong to tuning cotton technical field.Tuning cotton is divided into three kinds: the ultramicropore tuning cotton for low-frequency range tuning, micropore tuning cotton for Mid Frequency tuning, membrane structure tuning cotton for high band tuning, the aperture of the ultramicropore tuning cotton is 0.03~0.05mm, the aperture of the micropore tuning cotton is 0.1~0.5mm, the aperture of the membrane structure tuning cotton is 0.8~1.5mm, diaphragm rate is 50~80%, mainly it is made using heat pressing process, it is not required to add any additive, product of the invention is widely used in the higher field of audio frequency reduction degree, such as mobile phone, TV, game machine, computer, high-fidelity music center, Bluetooth audio device, earphone etc. occurs in electronic product.
Description
Technical field
The present invention relates to tuning cotton technical fields, specifically, being tuning cotton and its manufacture craft.
Background technique
After 2008, as electronic product increasingly minimizes, product is increasingly lighter thinner, to sounding in electronic product
The design requirement of unit is higher and higher, and traditional tuning material cannot be met the requirements.It is based on such case, it is seen that tuning cotton
The particular/special requirement of material, I is concentrated on studies, and carries out many experiments to inter-trade material, finally develops tune
Sound cotton material.
The tuning principle of tuning cotton material: sounding body generates vibration and generates sound with windage, in specific space
Sound frequency is different, in order to adjust the audio frequency generated in particular space, is improved in particular space using tuning cotton material
Audio frequency, virtual increase space keeps sound more mellow and fuller.Tuning cotton material is tied by the irregular aperture of different-diameter
The material being configured to, the audio frequency and acoustic pressure that sounding body generates, different frequency and acoustic pressure are compressed into tuning cotton material, by
In in specific space moment Repeated Compression and release, space transient absorption and release sound in irregular porous structure
Pressure audio frequency adjusts the virtual increase space of the frequency of audio under suitable tuning cotton aperturing.Generate toy trumpet
The effect of big speaker.
In low-frequency range, the big acoustic absorptivity of density wants high, and frequency is higher than 500Hz, shadow of the density to acoustic absorptivity
Very little is rung, this is because the density for increasing material can be such that its flow resistance increases, to make its low frequency absorption system for same material
It is several litres high, and the variation of medium, high frequency acoustic absorptivity is less, or even reduces.Influence of the thickness to acoustic absorptivity is big compared with density.Thickness
Increase, from high frequency to low frequency offset, low frequency absorption coefficient improves resonant frequency, to noise contribution biggish 500~
When 1250Hz, acoustic absorptivity is higher, and the variation of high frequency acoustic absorptivity is little.With the increase of sample thickness, sound sucting band width
Also it obviously widens, it in practical applications, should be according to the spectral characteristic of noise, the thickness of reasonably select material.Thus by for many years
Application in different acoustic products sums up, in particular space, the filling rate of sound-absorbing material be spatial dimension 60%~
Between 80%, highly for preferably, and the type of tuning cotton in the prior art is single between the 80%~90% of certain height, and
Addition additive, complex manufacturing technology are needed in its manufacture craft.
Summary of the invention
The present invention provides tuning cotton and its manufacture crafts.
Tuning cotton and its manufacture craft, which is characterized in that tuning cotton is divided into three kinds: the ultramicropore tune for low-frequency range tuning
Sound cotton, the micropore tuning cotton for Mid Frequency tuning, the membrane structure tuning cotton for high band tuning, the ultramicropore tuning cotton
Aperture be 0.03~0.05mm, the aperture of the micropore tuning cotton is 0.1~0.5mm, the aperture of the membrane structure tuning cotton
For 0.8~1.5mm, diaphragm rate is 50~80%；Its manufacture craft is as follows:
Raw material is carried out physics cutting according to the compression factor of raw material and is formed to hot pressing sheet material, to hot pressing sheet material by step (1)
With a thickness of 2~30mm；
Step (2) sets pressure, hot pressing time, temperature, the tooling parameter of hot press according to the thickness to hot pressing sheet material,
Carry out hot pressing；
The complete sheet material cooled to room temperature of step (2) hot pressing is made its solidification by step (3)；
Step (3) is solidified the sheet material completed and uses the thickness that measuring head diameter is 0.01mm for 30mm, precision by step (4)
Instrument carries out Thickness sensitivity；
Step (5) is packed by the sheet material of step (4) Thickness sensitivity.
Further, the raw material in the step (1) is polyurethane sponge or melamine sponge；Wherein make ultramicropore
The raw material that tuning cotton uses is melamine sponge, and the raw material that production micropore tuning cotton, membrane structure tuning cotton use is polyurethane
Sponge.
Further, the compression factor in the step (1) is 1:1~15:1.
Further, the pressure limit in the step (2) is 10~300kg, hot pressing time range is 5~90s, temperature
It is 0.1~6mm for 180~300 DEG C, tooling, the pressure, hot pressing time, temperature, tooling are with to hot pressing sheet thickness
Increase and increases.
Further, the tooling refers to the thickness reached needed for sheet material after hot pressing.
Further, in the solidification process in the step (3), using polyurethane sponge as the curing time of the sheet material of raw material
It is 72h by the curing time of the sheet material of raw material of melamine sponge for 6h, is the sheet material of raw material solid using melamine sponge
Rebound can be generated during change.
Compared with prior art, the positive effect of the present invention is:
1, technical process is relatively simple, it is easy to accomplish, convenient for control.
2, by using heat pressing process, without adding any additive in manufacturing process.
3, tuning cotton not of the same race can be selected according to frequency noise range, refines the classification of tuning cotton, improve tuning cotton
Noise reduction effect.
Detailed description of the invention
Fig. 1 is low-frequency spectra (FR) figure；
Fig. 2 is resonance frequency (IMP) figure；
Fig. 3 is harmonic amplitude (THD) figure.
Label in attached drawing 1,2,3 is respectively as follows: A. and tuning cotton curve is not used；B. tuning cotton curve is used
Specific embodiment
The present invention provides tuning cotton and its manufacture craft, for make the purpose of the present invention, technical solution and effect it is clearer,
Clear, the present invention is described in more detail below.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
Specific embodiment one:
Raw material is carried out physics cutting according to the compression factor (5:1) of polyurethane sponge and is formed to hot pressing piece by step (1)
Material, to hot pressing sheet material with a thickness of 10mm；
Step (2), according to hot pressing sheet material thickness setting hot press 30~40kg of pressure, hot pressing time 15s~
30s, 200 DEG C~215 DEG C of temperature, tooling 2mm parameter carry out hot pressing；
The complete sheet material cooled to room temperature of step (2) hot pressing is made its solidification through 6h by step (3), obtain with a thickness of
2mm, aperture are the micropore tuning cotton of 0.1~0.5mm；
Step (3) is solidified the sheet material completed and uses the thickness that measuring head diameter is 0.01mm for 30mm, precision by step (4)
Instrument carries out Thickness sensitivity；
Step (5) is packed by the sheet material of step (4) Thickness sensitivity.
Specific embodiment two:
Raw material is carried out physics cutting according to the compression factor (5:1) of melamine material and is formed to hot pressing piece by step (1)
Material, to hot pressing sheet material with a thickness of 10mm；
Step (2), according to hot pressing sheet material thickness setting hot press pressure 30kg~60kg, hot pressing time 40s~
60s, 260 DEG C~280 DEG C of temperature, tooling 1.8mm parameter carry out hot pressing；
The complete sheet material cooled to room temperature of step (2) hot pressing solidifies its rebound through 72h, obtains thickness by step (3)
Degree is 2mm, and aperture is the ultramicropore tuning cotton of 0.03~0.05mm；
Step (3) is solidified the sheet material completed and uses the thickness that measuring head diameter is 0.01mm for 30mm, precision by step (4)
Instrument carries out Thickness sensitivity；
Step (5) is packed by the sheet material of step (4) Thickness sensitivity.
The tuning principle of tuning cotton of the present invention:
Irregular ultra-fine hole (diameter is in 0.05~0.03mm) tuning cotton should be used to be adjusted in low-frequency range adjustment, it is former
Reason is that low frequency wavelength is longer, is effectively compressed and has been discharged in porous structure medium wavelength；In Mid Frequency adjustment using micro-
The tuning cotton of pore structure (0.1~0.5mm of diameter), principle are that intermediate frequency wavelength passes through in aperture in the triboabsorption improvement of aperture frame
The audio frequency effect of frequency range；The sound frequency of high band is higher, and is also easy to produce the frequency range of high frequency distortion, according to answering for space structure
Miscellaneous degree is most also easy to produce, and is adjusted using the tuning cotton material of membrane structure (diameter is in 1.5~0.8mm, diaphragm rate 50~80%)
Section, principle is that higher frequency upper wavelength is short, less by loss of the biggish aperture to acoustic pressure, while by diaphragm to height
The frequency point of frequency is absorbed, so that high frequency be adjusted.
The tuning cotton that specific embodiment one or two makes is put into generation cavity body under same experiment condition, compares and is put into
Cavity occurs for the generation cavity of tuning cotton to the energy transient absorption and release conditions of sound wave be not put into tuning cotton, as Fig. 1,
2, shown in 3:
Fig. 1 shows smooth using the curve of low frequency end after tuning cotton, improves part effect.This effect be equivalent to by
The effect that part cavity increases, toy trumpet generate the effect of big sound equipment.
Fig. 2 shows to have carried out mobile and amount of decrease using the frequency point of low frequency end after tuning cotton, keeps audio reduction more preferable more stable.
The effect of this effect is that audio frequency is more tended to dextrorotation Boeing frequency reduction rate height, the more mellow and fuller effect of sound.
Fig. 3 shows to be decreased obviously using the amplitude of low frequency end after tuning cotton, and the curve of low frequency end is smoother.This effect is sound
The effect that the secondary interference that frequency generates when playing reduces.Sound is set to be influenced to reduce by limited space.
Therefore, tuning cotton is put into generation cavity, by it to the energy transient absorption of sound wave and the consumption of release, played
By the widened effect of the volume of cavity, and then the low frequency (its effect, which is equal to, expands cavity) of entire mould group is reduced, while because
Its sensitivity of the consumption of energy is declined, so as to improve frequency.
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, and
Without departing from the spirit or essential characteristics of the present invention, the present invention can be realized in other specific forms.Therefore, nothing
By from the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended
Claim rather than above description limit, it is intended that the institute that will be fallen within the meaning and scope of the equivalent elements of the claims
It changes and is included within the present invention.
Claims (6)
1. a kind of ultramicropore tuning cotton for low-frequency range tuning, it is characterised in that the tuning cotton has irregular ultra-fine hole,
Its aperture is 0.03~0.05mm, and low frequency wavelength can be made effectively to be compressed and be discharged in porous structure.
2. the manufacture craft for the ultramicropore tuning cotton of low-frequency range tuning as described in claim 1, which is characterized in that it is made
It is as follows to make technique:
Step (1), the raw material that uses of production ultramicropore tuning cotton for melamine sponge, according to the compression factor 1:1 of raw material~
Raw material is carried out physics cutting and is formed to hot pressing sheet material, to hot pressing sheet material with a thickness of 2~30mm by 15:1；
Step (2) sets the pressure limit of hot press as 10~300kg, hot pressing time range according to the thickness to hot pressing sheet material
For 5~90s, temperature be 180~300 DEG C, tooling is 0.1~6mm, hot pressing is carried out, wherein the tooling refers to the piece after hot pressing
The thickness reached needed for material, and the pressure, hot pressing time, temperature, tooling with the increase to hot pressing sheet thickness and
Increase；
The complete sheet material cooled to room temperature of step (2) hot pressing is made its solidification, curing time 72h by step (3)；
Step (4), by step (3) solidify complete sheet material use measuring head diameter for 30mm, precision be 0.01mm thickness gauge into
Row Thickness sensitivity；
Step (5) is packed by the sheet material of step (4) Thickness sensitivity.
3. a kind of micropore tuning cotton for for Mid Frequency tuning, it is characterised in that the aperture of the tuning cotton be 0.1~
0.5mm can make Mid Frequency wavelength improve the audio frequency effect of Mid Frequency by the triboabsorption of aperture frame in aperture.
4. the manufacture craft for the micropore tuning cotton of Mid Frequency tuning as claimed in claim 3, which is characterized in that it makes work
Skill is as follows:
Step (1), the raw material that production micropore tuning cotton uses is polyurethane sponge, according to compression factor 1:1~15:1 of raw material
Raw material is carried out physics cutting to be formed to hot pressing sheet material, to hot pressing sheet material with a thickness of 2~30mm；
Step (2) sets the pressure limit of hot press as 10~300kg, hot pressing time range according to the thickness to hot pressing sheet material
For 5~90s, temperature be 180~300 DEG C, tooling is 0.1~6mm, hot pressing is carried out, wherein the tooling refers to the piece after hot pressing
The thickness reached needed for material, and the pressure, hot pressing time, temperature, tooling with the increase to hot pressing sheet thickness and
Increase；
The complete sheet material cooled to room temperature of step (2) hot pressing is made its solidification, curing time 6h by step (3)；
Step (4), by step (3) solidify complete sheet material use measuring head diameter for 30mm, precision be 0.01mm thickness gauge into
Row Thickness sensitivity；
Step (5) is packed by the sheet material of step (4) Thickness sensitivity.
5. a kind of membrane structure tuning cotton for high band tuning, which is characterized in that the tuning cotton uses membrane structure, aperture
For 0.8~1.5mm, diaphragm rate is 50~80%, less to acoustic pressure loss by biggish aperture, while by diaphragm to high frequency
Frequency point absorb so that high frequency be adjusted.
6. the manufacture craft for the membrane structure tuning cotton of high band tuning as claimed in claim 5, which is characterized in that it makes
Technique is as follows:
Step (1), the raw material that production membrane structure tuning cotton uses is polyurethane sponge, according to compression factor 1:1~15 of raw material:
Raw material is carried out physics cutting by 1 to be formed to hot pressing sheet material, to hot pressing sheet material with a thickness of 2~30mm；
Step (2) sets the pressure limit of hot press as 10~300kg, hot pressing time range according to the thickness to hot pressing sheet material
For 5~90s, temperature be 180~300 DEG C, tooling is 0.1~6mm, hot pressing is carried out, wherein the tooling refers to the piece after hot pressing
The thickness reached needed for material, and the pressure, hot pressing time, temperature, tooling with the increase to hot pressing sheet thickness and
Increase；
The complete sheet material cooled to room temperature of step (2) hot pressing is made its solidification, curing time 6h by step (3)；
Step (4), by step (3) solidify complete sheet material use measuring head diameter for 30mm, precision be 0.01mm thickness gauge into
Row Thickness sensitivity；
Step (5) is packed by the sheet material of step (4) Thickness sensitivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910507670.5A CN110248305B (en) | 2016-04-19 | 2016-04-19 | Tuning cotton and manufacturing process thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610241130.3A CN106358132B (en) | 2016-04-19 | 2016-04-19 | A kind of manufacture craft of tuning cotton |
| CN201910507670.5A CN110248305B (en) | 2016-04-19 | 2016-04-19 | Tuning cotton and manufacturing process thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610241130.3A Division CN106358132B (en) | 2016-04-19 | 2016-04-19 | A kind of manufacture craft of tuning cotton |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110248305A true CN110248305A (en) | 2019-09-17 |
| CN110248305B CN110248305B (en) | 2021-07-09 |
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| CN201610241130.3A Active CN106358132B (en) | 2016-04-19 | 2016-04-19 | A kind of manufacture craft of tuning cotton |
| CN201910507670.5A Active CN110248305B (en) | 2016-04-19 | 2016-04-19 | Tuning cotton and manufacturing process thereof |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610241130.3A Active CN106358132B (en) | 2016-04-19 | 2016-04-19 | A kind of manufacture craft of tuning cotton |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110191386B (en) * | 2019-05-31 | 2021-03-19 | 歌尔科技有限公司 | External earphone |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106358132B (en) | 2019-09-17 |
| CN106358132A (en) | 2017-01-25 |
| CN110248305B (en) | 2021-07-09 |
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