Diaphragm of a sounding device, preparation method thereof, and sounding device

A sound-generating device and photoinitiator technology, applied in the field of acoustic devices, can solve problems such as difficult demoulding, uneven cross-linking bonds, and environmental pollution, and achieve the effects of improving difficult demoulding, no pollution to the environment, and low energy consumption

Active Publication Date: 2021-01-22
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to propose a vibrating membrane of a sounding device and its preparation method, and a sounding device. The vibrating membrane can be molded at room temperature. During the molding process, high-temperature pressure-holding vulcanization is not required, the molding efficiency is significantly improved, and the single-layer vulcanized rubber vibrating membrane is improved. The problem of difficult demoulding during the molding process reduces the warping and deformation of the diaphragm product; the diaphragm is cross-linked by ultraviolet light without adding a vulcanizing agent, which avoids the uneven cross-linking bonds and pollution caused by the vulcanizing agent in the traditional vulcanization process environmental problems

Method used

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  • Diaphragm of a sounding device, preparation method thereof, and sounding device
  • Diaphragm of a sounding device, preparation method thereof, and sounding device
  • Diaphragm of a sounding device, preparation method thereof, and sounding device

Examples

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preparation example Construction

[0067] The second aspect provides a method for preparing the diaphragm of the sound emitting device in the first aspect, comprising the following steps:

[0068] Provide rubber mix; wherein, the raw material of the rubber mix includes raw rubber, photoinitiator and filler reinforcing agent;

[0069] Making the mixed rubber into a film body through a film-forming process;

[0070] Air-explosion molding is performed on the film body to form a diaphragm, and ultraviolet light irradiation and cross-linking are performed in the air-explosion molding.

[0071] In the embodiment of the present invention, the film forming process is not particularly limited, and a film forming process well known to those skilled in the art may be used. Preferably, the film forming process may adopt a calendering process, a coating process or a casting process to form a film.

[0072]In gas explosion molding, the membrane body is placed on the mold and sealed in a gas mask, and molded at a certain te...

Embodiment 1

[0080] A diaphragm of a sounding device, the diaphragm is composed of one layer of vulcanized rubber layer, wherein the preparation method of the vulcanized rubber layer comprises the following steps:

[0081] Provide rubber compound; wherein, the rubber compound includes the following raw materials in percentage by weight: raw rubber 65%, photoinitiator 3%, filler reinforcing agent 25% and auxiliary agent 7%, and the sum of the weight of each raw material is 100%. ;

[0082] The compound rubber is made into a film body through a coating process;

[0083] Carry out gas explosion molding to the membrane body to form a diaphragm, and perform ultraviolet light irradiation crosslinking in the gas explosion molding; the pressure of the gas explosion molding is 1MPa; the ultraviolet light wavelength of the ultraviolet light irradiation crosslinking is 200nm, UV light intensity is 1000mw / cm 2 , UV irradiation time is 30s.

[0084] Wherein, the molecular weight of the raw rubber is...

Embodiment 2

[0086] A diaphragm of a sounding device, the diaphragm comprises a layer of vulcanized rubber and a layer of thermoplastic elastomer, wherein the preparation method of the vulcanized rubber layer comprises the following steps:

[0087] Provide rubber compound; wherein, the rubber compound includes the following raw materials in percentage by weight: raw rubber 45%, photoinitiator 5%, filler reinforcing agent 40% and auxiliary agent 10%, and the sum of the weight of each raw material is 100%. ;

[0088] The compound rubber is made into a film body through a calendering process;

[0089] Perform gas explosion molding on the film body to form a diaphragm, and perform ultraviolet light irradiation crosslinking in the gas explosion molding; the pressure of the gas explosion molding is 0.05MPa; the ultraviolet light irradiation crosslinking ultraviolet wavelength It is 100nm, the intensity of ultraviolet light is 200mw / cm2, and the irradiation time of ultraviolet light is 60s.

[...

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Abstract

The invention discloses a vibrating membrane of a sounding device, a preparation method thereof, and a sounding device. The vibrating membrane includes at least one layer of vulcanized rubber layer, and the vulcanized rubber layer is prepared by gas explosion molding of mixed rubber. Ultraviolet light irradiation and crosslinking are carried out in the gas explosion molding; the raw materials of the mixed rubber include raw rubber, photoinitiator and filler reinforcing agent. The invention adopts gas explosion molding and ultraviolet light irradiation crosslinking curing process to prepare vulcanized rubber diaphragm, which can realize crosslinking reaction at room temperature, reduce the requirements on temperature and pressure, reduce energy consumption, save production cost, and have remarkable molding efficiency Improvement; the problem of difficult demoulding of the single-layer vulcanized rubber diaphragm during the molding process is improved, and the warping and deformation of the diaphragm product is reduced; the invention does not need to add a vulcanizing agent, and avoids the cross-linking caused by the uneven vulcanizing agent in the traditional vulcanization process Bond unevenness, energy saving and environmental protection, no pollution to the environment, and the comprehensive performance of vulcanized rubber is better.

Description

technical field [0001] The invention relates to the technical field of acoustic devices, in particular, the invention relates to a diaphragm of a sound generating device, a preparation method thereof, and a sound generating device. Background technique [0002] The loudspeaker is used to convert electrical energy into sound energy, and generally includes a basin-shaped shell, a vibration system and a magnetic circuit system housed in an inner cavity surrounded by the shell, and the vibration system includes a diaphragm and a voice coil connected together. Among them, the speaker diaphragm is the main part of the speaker. The speaker converts the electromagnetic force to the diaphragm closely connected with it through the voice coil in the center of the diaphragm to form a mechanical force to generate sound and complete the conversion of electricity-force-sound. In the process of electric-force-acoustic conversion, the diaphragm is the middle mechanical part and the most impo...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C08L23/08C08L23/16C08L83/04C08L9/02C08L81/04C08J5/18C08J3/24C08J3/28H04R7/12B32B25/08B32B25/16B32B25/20B32B27/36B32B27/06B32B25/14B32B27/28B32B27/30B32B33/00
CPCC08J5/18C08J3/24C08J3/28H04R7/12B32B25/08B32B25/16B32B25/20B32B27/36B32B25/14B32B27/288B32B27/302B32B27/365B32B33/00C08J2323/08C08J2323/16C08J2383/04C08J2423/16C08J2483/04C08J2309/02C08J2381/04
Inventor周厚强李春
OwnerGOERTEK INC