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Vibrating diaphragm for electro-acoustic system and preparation method of vibrating diaphragm

An electro-acoustic and rubber compounding technology, which is applied in the field of acoustic materials, can solve the problems of large permanent tensile change, high internal friction distortion, poor heat and cold resistance, etc., and achieves good molding consistency, simple processing technology, and improved The effect of production efficiency

Inactive Publication Date: 2017-07-18
AAC TECH PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diaphragm in the vibration system is usually made of multi-layer thermoplastic resin by coating and bonding, which has the problems of low efficiency, high cost and poor consistency
In addition, multi-layer thermoplastic resins have poor heat and cold resistance, are prone to plastic deformation at high temperatures, and are brittle and destroyed at low temperatures. Completely restore the essence of sound

Method used

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  • Vibrating diaphragm for electro-acoustic system and preparation method of vibrating diaphragm
  • Vibrating diaphragm for electro-acoustic system and preparation method of vibrating diaphragm
  • Vibrating diaphragm for electro-acoustic system and preparation method of vibrating diaphragm

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Experimental program
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Effect test

Embodiment 1

[0031]

[0032]

[0033] The white carbon black in the above materials is selected: precipitated white carbon black with a specific surface area of ​​50m 2 / g, the particle size is 80 μm.

[0034] Add the above-mentioned materials into the banbury mixer in turn for banbury mixing, and then remove the glue after banbury mixing for 20 minutes. Fill the rubber into the mold, and then hot-press to form a diaphragm. The hot-press temperature is 90°C, the time is 30 minutes, and the pressure is 100Mpa.

[0035] refer to figure 1 , the infrared spectrum of the diaphragm shows that the vibration peak of nitrile-C≡N appears at 2237.31cm -1 ; The vibration peak of the ester group-C=O is at 1733.91cm -1 ; The vibration peak of the ester group C-O is at 1193.87cm -1 and 1157.23cm -1 ; The vibration peak of Si-O-Si appears at 1095.51cm -1 place. It can be known that the raw rubber used to make the vibrating membrane contains nitrile groups and ester groups. The raw rubber can...

Embodiment 2

[0037]

[0038] The white carbon black in the above materials is selected: precipitated white carbon black, the specific surface area is 100m 2 / g, the particle size is 30 μm.

[0039] Put the above-mentioned materials into the internal mixer successively for internal mixing, and remove the glue after internal mixing for 10 minutes. Fill the rubber into the mold, and then hot-press to form a diaphragm. The hot-press temperature is 250°C, the time is 1 minute, and the pressure is 1Mpa.

[0040] refer to figure 2 , the infrared spectrum of the diaphragm shows that the vibration peak of the ester group-C=O is at 1730.061cm -1 ; The vibration peak of the ester group C-O is at 1195.8cm -1 and 1157.23cm -1 、1234.38cm -1 and 1020.29cm -1 ; The vibration peak of Si-O-Si appears at 1093.58cm -1 place. It can be known that the raw rubber used to make the vibrating membrane contains ester groups, and the raw rubber may be composed of acrylate and ethylene vinyl acetate copoly...

Embodiment 3

[0042] Component Mass percentage % Raw rubber 50 Silica 45 aging agent 1 Processing aids 1 Vulcanization aid 1 Vulcanizing agent 2

[0043] The white carbon black in the above materials is selected: fumed white carbon black, the specific surface area range is 500m 2 / g, the particle size is 1nm.

[0044] Put the above-mentioned materials into the internal mixer successively for internal mixing, and remove the glue after internal mixing for 10 minutes. Fill the rubber into the mold, and then hot press to form a diaphragm. The hot pressing temperature is 200°C, the time is 2 minutes, and the pressure is 10Mpa.

[0045] refer to image 3 , in the infrared spectrum of the diaphragm, the vibration peak of the nitrile group -C≡N appears at 2235.38cm -1, the vibration peak of Si-O-Si appears at 1093.58cm -1 place. It can be known that the raw rubber used to make the diaphragm contains nitrile groups, and may be composed of hydr...

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Abstract

The invention belongs to the technical field of acoustic materials and discloses a vibrating diaphragm for an electro-acoustic system. The vibrating diaphragm is prepared from a rubber mixed compound, wherein the rubber mixed compound is prepared by mixing raw rubber, a filling and an additive; the vibrating diaphragm is prepared from the rubber mixed compound through vulcanization; the rubber mixed compound is prepared by mixing raw rubber, the filling and the additive; the raw rubber contains nitrile groups and / or ester groups; the filling contains Si-O-Si groups; the additive contains a vulcanizing agent. The invention simultaneously provides a preparation method of the vibrating diaphragm. According to the preparation method, a rubber material is utilized for replacing a multi-layer resin composite film raw material to prepare the vibrating diaphragm, and distortion can be reduced by virtue of internal friction of the rubber, so that the nature of sound can be well restored by the prepared vibrating diaphragm; and besides, the material cost is low, the processing process is simple, the forming consistency is good, and the production efficiency can be substantially improved.

Description

technical field [0001] The invention relates to the technical field of acoustic materials, in particular to an electroacoustic system material and a preparation method thereof. Background technique [0002] Electro-acoustic devices refer to devices that convert electricity and sound, which use electromagnetic induction, electrostatic induction or piezoelectric effects to complete electro-acoustic conversion, mainly including speakers, earphones, microphones, cartridges, etc. As human beings enter the information age, information dissemination is inseparable from "seeing" and "listening", and "listening" cannot be separated from the electroacoustic industry. The adjustment of the electronic industry in today's world, the rapid development of information technology and communication technology have had a huge impact on the development of the electroacoustic industry, and the industry has developed rapidly. Both the domestic market and the international market show the charact...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L15/00C08L33/04C08L23/08C08L21/00C08K3/36
CPCC08J5/18C08J2309/02C08J2315/00C08J2321/00C08J2323/08C08J2333/04C08K3/36C08K2201/003C08K2201/006C08L15/005C08L23/0853C08L33/04C08L2203/16C08L9/02
Inventor 廖振斐刘浩严绪东王书宪
Owner AAC TECH PTE LTD
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