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Horn vibrating diaphragm and forming technology thereof

A molding process and vibrating film technology, applied in the direction of electrical components, sensors, etc., can solve the problems of no obvious improvement in sound quality, poor rigidity of plastic diaphragm, and affecting the sound quality of speakers, etc., to achieve mass production and good weather resistance , long service life effect

Active Publication Date: 2016-05-04
DONGGUAN FORBETTER PLASTIC & ELECTRONICS PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among them, the paper diaphragm has been around for a long time and is widely used in some speakers. However, due to the disadvantage of the paper diaphragm being susceptible to moisture, the sound quality is unstable, and it is gradually replaced by other diaphragms.
The plastic diaphragm has the advantages of low cost, good plasticity, and easy processing, but the rigidity of the plastic diaphragm is poor, which seriously affects the sound quality of the speaker
Usually, those skilled in the art improve the rigidity of the diaphragm by modifying the plastic and adding some rigidity-enhancing fibers, but this will greatly increase the cost of the diaphragm, but the sound quality will not be significantly improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The molding process of a kind of horn vibrating membrane of the present embodiment comprises the following steps:

[0046] Step (A): Surface treatment of the plastic shell and the intermediate diaphragm to remove impurities;

[0047] Step (B): Place the surface-treated plastic shell and intermediate diaphragm in the rear mold of the injection mold, and then lock the front mold with a certain pressure. After the front mold and the rear mold are closed, the outer surfaces of the mold are respectively Squeeze with an extrusion mold, and then inject liquid silicone into the mold of the injection mold;

[0048] Step (C): Vulcanize the injection-molded liquid silicone to obtain a speaker diaphragm.

[0049] Wherein, the vulcanizing agent is a mixture of N, N'-m-phenylene bismaleimide and xanthic acid at a ratio of 2:0.4 by weight; wherein, the vulcanization molding temperature is 80°C; wherein, the locking front mold The pressure with the rear mold is 10bar; among them, the...

Embodiment 2

[0052] The difference between this embodiment and Example 1 is that the vulcanizing agent of this embodiment is a mixture of N, N'-m-phenylene bismaleimide and xanthic acid in parts by weight of 3-0.35; wherein, The temperature of vulcanization molding is 90°C; wherein, the pressure of locking the front mold and the rear mold is 15bar; wherein, the pressure of the glue at the injection point is 20bar.

[0053] The horn diaphragm Young's modulus that present embodiment makes is 6150N / (mm 2 ), the density is 1.1g / (cm 3 ), the glass transition temperature is 115°C, the relative damping is 0.55, the elongation is 580%, the tensile strength is 9MPa, and the tear strength is 43kN / m.

[0054] The rest of the content of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

Embodiment 3

[0056] The difference between this embodiment and Example 1 is that the vulcanizing agent of this embodiment is a mixture of N, N'-m-phenylene bismaleimide and xanthic acid in parts by weight of 4-0.3; wherein, The temperature of vulcanization molding is 100°C; wherein, the pressure of locking the front mold and the rear mold is 50bar; wherein, the pressure of the glue at the injection point is 40bar.

[0057] The horn diaphragm Young's modulus that present embodiment makes is 6300N / (mm 2 ), the density is 1.2g / (cm 3 ), the glass transition temperature is 120°C, the relative damping is 0.6, the elongation is 520%, the tensile strength is 8.5MPa, and the tear strength is 40kN / m.

[0058] The rest of the content of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

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Abstract

The invention relates to the technical field of vibrating diaphragms, and particularly relates to a horn vibrating diaphragm and a forming technology thereof. The forming technology comprises the following steps that (A) surface treatment is performed on a plastic shell and an intermediate diaphragm, and impurities are removed; (B) the plastic shell and the intermediate diaphragm after surface treatment are arranged in the rear mould of a plastic injection mould, then a front mould is locked by certain pressure, the external side surfaces of the moulds are respectively extruded by utilizing an extrusion mould after the front mould and the rear mould are closed, and then liquid silica gel is injected in the mould of the plastic injection mould; and (C) the injected liquid silica gel is formed through sulfuration so that the horn vibrating diaphragm is obtained. According to the forming technology, injection formation is performed by using liquid silica gel, and the manufactured vibrating diaphragm has advantages of high elasticity, high toughness, great transient state, sensitivity and frequency response and lasting great sound quality.

Description

technical field [0001] The invention relates to the field of vibrating membrane technology, in particular to a horn vibrating membrane and a forming process thereof. Background technique [0002] With the improvement of people's living standards, the requirements for a series of audio facilities such as earphones and speakers are getting higher and higher, especially for mobile phones and in-ear earplug speakers. The development trend is to have better and better sound effects and more and more Smaller sound generators. As one of the key components of the original sound generator, the diaphragm has a vital impact on the sound quality of the speaker. Therefore, the design of the diaphragm has always been one of the important topics of continuous innovation in the industry. [0003] The objective indicators such as the frequency response curve of the speaker are mainly determined by the geometric shape of the diaphragm, while the subjective indicators such as the sound qualit...

Claims

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Application Information

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IPC IPC(8): H04R31/00
CPCH04R31/003
Inventor 邢和平张国强
Owner DONGGUAN FORBETTER PLASTIC & ELECTRONICS PRODS
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